100Ah lithium battery charger. 100ah lithium battery charger

Charging batteries

Mastervolt gel (2 V, 12 V) and Mastervolt AGM (6 V, 12 V) batteries should be charged with a voltage of 14.25 V for 12 V systems and 28.5 V for 24 V systems. The absorption phase is followed by the float phase (see 3-step charging characteristic on page 242) in which the voltage is reduced to 13.8 V for 12 V systems and 27.6 V for 24 V systems. These figures assume a temperature of 25 °C.

For wet lead-acid batteries, the absorption voltage is 14.25 V for 12 V systems and 28.5 V for 24 V systems. The float voltage for this type of battery is 13.25 V for 12 V and 26.5 V for 24 V systems. All of these figures are for 25 °C.

Lithium Ion batteries are charged with an absorption voltage of 14.25 V for 12 V, and 28.5 V for 24 V systems. The float voltage is 13.5 V for 12 V and 27 V for 24 V systems.

Charge current

A rule of thumb for gel and AGM batteries states that the minimum charging current should be 15 to 25 % of the battery capacity. During charging, you usually continue to supply power to connected devices, and this power consumption should be added to the 15-25 %.

This means that a 400 Ah battery bank and a connected load of ten amperes requires a battery charger capacity of between 70 and 90 amperes in order to charge the battery in a reasonable time.

The maximum charging current is 50 % for a gel battery, and 30 % for an AGM battery. Mastervolt Lithium Ion batteries can be subjected to much higher charge currents. However, to maximise the lifespan of the Lithium Ion battery, Mastervolt recommends a maximum charging current of 30 % of the capacity. For a 180 Ah battery, for instance, this means a maximum charge current of 60 amperes.

A battery charger with temperature compensation for optimal protection

Ensuring the longest possible lifespan for gel, AGM and Lithium Ion batteries requires a modern Mastervolt battery charger with a three-step charge characteristic. These battery chargers continuously regulate charge voltage and charge current.

For wet gel and AGM batteries, it is recommended to have a sensor for measuring the temperature of the battery. This adjusts the charge voltage to the temperature of the battery, extending its lifespan. We call this ‘temperature compensation’.

Temperature compensation curve

Because devices such as refrigerators are always drawing power from a battery, even while it is being charged, Mastervolt’s temperature compensation includes a maximum offsetting effect to protect the connected devices. The compensation is at most 14.55 V for a 12 V system, and 29.1 V for a 24 V system.

Adjusting the voltage to a higher or lower temperature is not required for Lithium Ion batteries.

The formula below is used to calculate the charging time of a Gel or AGM battery:

The formula below is used to calculate the charging time of a Lithium Ion battery:

Lt = charging time Co= capacity drawn from the battery eff = efficiency; 1.1 for a Gel battery, 1.15 for a AGM battery and 1.2 for a flooded batteryAl = battery charger currentAb = consumption of the connected equipment during the charging process

Calculating charging time

Calculating the charge time of a battery should take into account the following:

The first consideration is the efficiency of the battery. In a standard wet battery, this is around 80%. This means that if 100 Ah are discharged from the battery, 120 Ah need to be charged in order to be able to extract 100 Ah again. With gel and AGM batteries, the efficiency is higher – 85 to 90 % – so there is less loss and the charge time is shorter in comparison with wet batteries. In Lithium Ion batteries, the efficiency is as high as 97 %.

Another thing that needs to be kept in mind when calculating charge time is that the last 20 % of the charging process (from 80 to 100 %) takes around four hours with wet, gel and AGM batteries (this does not apply to Lithium Ion batteries). In the second phase, also called the absorption or after-charge phase, the type of battery determines how much current is being absorbed, independently of the capacity of the battery charger.

The after-charge phase phenomenon again does not apply to Lithium Ion batteries, which are charged much faster.

The harmful effects of ripple voltage on batteries

A battery can become prematurely defective due to the ripple voltage produced by battery chargers. To prevent this, the ripple voltage caused by a charger should remain as low as possible.

The ripple voltage results in ripple current. As a rule of thumb, the ripple current should remain below five per cent of installed battery capacity. If navigation or communications equipment such as GPS or VHF devices is connected to the battery, the ripple voltage should be no more than 100 mV (0.1 V). Any more could cause the equipment to malfunction.

Mastervolt battery chargers are equipped with excellent voltage regulation and the ripple voltage they produce is always lower than 100 mV.

Another advantage of low ripple voltage is to prevent damage to the system if, for example, a battery terminal is not properly secured or is corroded. Thanks to its low ripple voltage, a Mastervolt battery charger can even supply the system without being attached to a battery pack.

Finding the state of charge of a battery

The adjacent explanation regarding the Peukert exponent shows that the state of charge of a battery cannot simply be determined based on, for instance, measuring battery voltage.

The best and most accurate manner to check the state of charge is to use an amp hour meter (battery monitor). An example of such a meter is the Mastervolt MasterShunt, BTM-III or BattMan battery monitor. In addition to the charge and discharge current, this monitor also indicates battery voltage, the number of amp-hours consumed, and the time remaining until the battery bank needs recharging.

One of the things that set the Mastervolt battery monitor apart from other suppliers is the availability of historical data. This shows, for example, the charge/discharge cycles of the battery, the deepest discharge, the average discharge, and the highest and lowest measured voltage.

Peukert’s Law

On the surface it seems easy to calculate how much longer a battery will continue to supply sufficient power. One of the most common methods is to divide battery capacity by discharge current. In practice, however, such calculations often turn out to be wrong. Most battery manufacturers specify battery capacity assuming a discharge time of 20 hours. A 100 Ah battery, for instance, is supposed to deliver 5 amps per hour for 20 hours, during which time voltage should not drop below 10.5 volt (1.75 V/cell) for a 12 V battery. Unfortunately, when discharged at a current level of 100 amps, a 100 Ah battery will deliver only 45 Ah, meaning that it can only be used for less than 30 minutes.

100ah, lithium, battery, charger

This phenomenon is described in a formula – Peukert’s Law – devised more than a century ago by the battery pioneers Peukert (1897) and Schroder (1894). Peukert’s Law describes the effect of different discharge values on the capacity of a battery, i.e. that battery capacity is reduced at higher discharge rates. All Mastervolt battery monitors take this equation into account so you will always know the correct status of your batteries.

Peukert’s Law does not apply for Lithium Ion batteries as the connected load will have no effect on the available capacity.

The Peukert formula for battery capacity at a given discharge current is:

Cp = battery capacity available with the given discharge currentI = the discharge current leveln = the Peukert exponent = log T2. logT1 : log I1. log I2T = discharge time in hours

I1, I2 and T1, T2 can be found by carrying out two discharge tests. This involves draining the battery twice at two different current levels.

One high (I1) – 50 % of battery capacity, say – and one low (I2) – around 5 %. In each of the tests, the time T1 and T2 that passes before battery voltage has dropped to 10.5 volt is recorded. Carrying out two discharge tests is not always simple. Often, no large load will be available or there will be no time for a slow discharge test. You can retrieve the data necessary for calculating the Peukert exponent from the specifications of the battery.


Under normal conditions, gel, AGM and Lithium Ion batteries produce little or no dangerous hydrogen gas. The little gas that escapes is negligible. However, just like with all other batteries, heat is generated during charging. To ensure the longest possible lifespan, it is important for this heat to be removed from the battery as quickly as possible. The following formula can be used to calculate the ventilation required for Mastervolt battery chargers.

Q = required ventilation in m³/hI = maximum charge current of the battery chargerf1 = 0.5 reduction for Gel batteriesf2 = 0.5 reduction for closed batteriesn = number of cells used (a 12-volt battery has six cells of 2 volt each)

Returning to the example of a 12 V/400 Ah battery set and an 80-amp charger, the minimum ventilation necessary will be: Q = 0.05 x 80 x 0.5 x 0.5 x 6 = 6 m³/h

This air flow is so small that normally natural ventilation will be sufficient. If the batteries are installed in a closed casing, two openings will be needed: One on the top and one underneath. The dimensions of the ventilation opening can be calculated using the following formula:

A = opening in cm² Q = ventilation in m³

In our case, this amounts to 28 x 6 = 168 cm² (around 10 x 17 cm) for each opening.

Lithium Ion batteries do not produce any hydrogen gas and are therefore safe to use. When batteries are charged quickly there is some degree of heat production, in which case the above formula can be used to remove the heat.

Contact your installer for larger systems with multiple battery chargers.

0ah lithium battery charger

AIMS Power, AGM12V100A, AGM 12V 100Ah Deep Cycle Battery Heavy Duty

This 12V AGM battery is a heavy duty, deep cycle battery ideal for back-up power and stored power applications. Affordable without compromising.

Model: AGM12V100A Manufacturer: AIMS Power

AIMS Power, AGM12V200A, AGM 12V 200Ah Deep Cycle Battery Heavy Duty

This 12V AGM battery is a heavy duty, deep cycle battery ideal for back-up power and stored power applications. Affordable without compromising.

Model: AGM12V200A Manufacturer: AIMS Power

AIMS Power, AGM6V225A, AGM 6V 225Ah Deep Cycle Battery Heavy Duty

This 6V AGM battery is a heavy duty, deep cycle battery ideal for back-up power and stored power applications. Affordable without compromising.

Model: AGM6V225A Manufacturer: AIMS Power

AIMS Power, CON120AC12/24DC, AC Converter / Battery Charger 12V 24V Smart Charger 75 Amps. Listed to UL 458/CSA

The AIMS Power AC Converter / Battery Charger/ Power Supply 12V/24V is ideal for applications that require diverse ways of recharging batteries.

Model: CON120AC12/24DC Manufacturer: AIMS Power

AIMS Power, CON120AC36/48DC, AC Converter / Battery Charger 36V 48V Smart Charger 25 Amps

Boasting versatility and a high charging capacity, the AIMS 36V and 48V AC 25/18.5-Amp Converter/Battery Charger from AIMS Power provides wide.

Model: CON120AC36/48DC Manufacturer: AIMS Power

AIMS Power, LFP12V100B, Lithium Battery 12V 100Ah LiFePO4 Lithium Iron Phosphate with Bluetooth Monitoring

AIMS Power introduces its new battery product line of LiFePO4 batteries. The LiFePO4 batteries maintain constant output voltage, providing more.

Model: LFP12V100B Manufacturer: AIMS Power

AIMS Power, LFP12V200B, Lithium Battery 12V 200Ah LiFePO4 Lithium Iron Phosphate with Bluetooth Monitoring

The Lithium 12V 200Ah LiFePO4 Battery with Bluetooth Monitoring from AIMS Power is a member of our new battery product line of LiFePO4 batteries. The.

Model: LFP12V200B Manufacturer: AIMS Power

AIMS Power, LFP12V50AB, Lithium Battery 12V 50Ah LiFePO4 Lithium Iron Phosphate with Bluetooth Monitoring

AIMS Power introduces its new battery product line of LiFePO4 batteries. The LiFePO4 batteries maintain constant output voltage, providing more.

Model: LFP12V50AB Manufacturer: AIMS Power

AIMS Power, LFP24V400A, Lithium Battery 24V 400AMP LIfePO4 Industrial Grade

Specifications 24Volt Lithium Iron Phosphate. LiFePO4 400 amps Battery status LED State of Charge display On/off switch 3/8 terminals Terminal.

Model: LFP24V400A Manufacturer: AIMS Power

AIMS Power, LFP48V200A, Lithium Battery 48V 200AMP LIfePO4 Industrial Grade

Specifications 24Volt Lithium Iron Phosphate. LiFePO4 400 amps Battery status LED State of Charge display On/off switch 3/8 terminals Terminal.

Model: LFP48V200A Manufacturer: AIMS Power

Charging Lithium Batteries: The Basics

When purchasing from our company, the process of charging lithium batteries becomes an everyday part of the routine, and we understand that there’s a lot of information about our products. Whether it’s about how the technology accepts a charge or best charging practices, we’re here to outline the basics. Whether it’s best charging practices about lithium batteries, to more information about how they cycle and can be charged in order to keep your battery system running efficiently, our team is here to help.

How can I charge a LiFePO4 battery?

Our team gets this question daily, and we have a blog post on charging LiFePO4 batteries that helps address that topic. There are three main ways to charge a system: solar, alternator, and shore.

Battle Born Batteries only sells accessories from brands we know to produce quality products. One such company is Victron Energy. Battle Born is a master dealer of Victron components because they are reliable and well-built. They even offer the Victron Connect phone app where you can view all the details of your Bluetooth-capable devices.

Our team also recommends components from Progressive Dynamics and Magnum. We have plenty for purchase, so check out our store if you’re looking for more power!

100ah, lithium, battery, charger

One component we often recommend is the Victron Energy SmartSolar MPPT charge controllers for systems equipped with solar. With Solar Charge Controllers we recommend the following settings:

We also frequently suggest Victron’s IP-65 Blue Smart Charger because it’s waterproof, Bluetooth compatible, and has a charging profile for lithium batteries and other battery chemistries. This device connects directly to the battery and is meant for single-battery charging. It’s great for those with trolling motor applications or those with battery systems connected in series.

For alternator charging, we often recommend using a DC-to-DC charger or battery-to-battery charger. The Victron Orion-TR Smart DC-DC isolated charger is an adaptive, three-stage charger with algorithms for bulk, absorption, and float options.

You also can mix battery chemistries safely with this device, such as your AGM starting battery to your lithium house bank. Aim for a range between 14.2V and 14.6V with bulk and absorption stages and for the float stage, 13.6V is best.

While lithium batteries technically don’t need to be floated, a good majority of the devices out there still have a float charge mode. The batteries naturally float at 13.6V but reaching 14.6V is ideal and needs to happen in order to engage its balancing mechanisms.

Do I have to buy a special charger for LiFePO4 batteries?

Addressing this question, our COO. Sean. highlights how a retrofit kit from Progressive Dynamics with a con verter system has lithium battery charging options. A nother charger we recommend is a Progressive Dynamics Inteli.Power 9100 because of how easy they are to incorporate and install into your system. in addition to any Victron component.

Can I Charge My L ithium B atteries Using The Alternator?

Alternator charging is a common method to recharge lithium batteries. Charging from your alternator is a great option, however, you will need some extra equipment, like a battery isolation manager (BIM).

A well-known industry tool, this component is programmed specifically to run with our batteries. It helps with simultaneously monitoring the house and starter bank and has high internal resistance. It can certainly take more power from the alternator when compared to lead-acid batteries.

The BIM provides an extra layer of safety to make sure you don’t damage your system of three or more lithium batteries when charging from the alternator during a long drive. If you have less than three of our batteries in your system, a BIM isn’t exactly required, and instead, you can use a standard isolator. They can regulate the current up to 220 amps and prevent damaging the alternator during a long drive.

Sterling Alternator Protection devices (APD) are also available in our store to prevent damage from surges. These devices turn on with a small resistive load of milli-amp hours to reduce a possible increase in voltage due to cables breaking or any other issues. If the increase is excessively rough, it can lead to serious APD damage, but your alternator, batteries, and regulators have been protected.

The Lithium Battery Charging C ycle : to float or not to float?

Our lithium batteries don’t need to be float-charged.

When it comes to the charging cycle and our batteries, they do not need to float. When you ’re charging lithium batteries up fully. you can disconnect your charger and leave them in storage. Please note that batteries will lose a bit of charge over time, but it won’t damage the battery. They might need to be topped off when bringing them out of storage. There is no need to trickle charge your Battle Born Batteries.

However, if you have an RV with a battery bank plugged into shore, you should avoid runnin g your appliances off the battery bank. Unless you are utilizing a cutoff switch in your system, you do not have a choice to where the 12v comes from. Our team recommends that if you have a fixed voltage output converter, it’s best to use a disconnect switch to remove the batteries from the circuit and allow them to rest.

If you have a multistage charger or converter, you are able to keep the batteries in the circuit because they will be able to rest at an acceptable voltage in the final stage of the charge.

When charging a lead – acid battery, the three main stages are bulk, absorption, and float. Occasionally. there are equalization and maintenance stages for lead – acid batteries as well. This differs significantly from charging lithium batteries and their constant current stage and constant voltage stage. In the constant current stage, it will keep it steady while the battery takes the bulk of its charge. Once the maximum voltage is reached then the charger will hold that voltage and the current will begin to drop as the battery is topped off.

For a lead – acid battery. that constant voltage stage is typically called absorption, and because the lead-acid has a higher resistance. the charger will hit the higher absorption stage halfway through the charg ing cycle. You could be bulk charging at the maximum current for a couple of hours and then you’d have to wait another 2-3 hours in absorption while the battery is being topped off. By contrast, our batteries will stay in the constant current or bu lk stage for almost the entire charge cycle.

Once it hits the maximum voltage, 14.4V, then the battery is basically charged. Now we request that you hold that voltage for 15-20 minutes per battery. It’s not necessarily for the battery to get topped off but it helps the battery balance. Cell voltage starts to separate at maximum voltage. Once that voltage separation happens, we can tell wh ich cell is more charged than the others.

Once we know that, then the battery management system ( BMS ) can initiate a balancing cycle where the highest charged batteries are bled through a resistor, and then all of them can come back down to the same state of charge. Although there is no required absorption for our battery, we use the absorption stage in conventional chargers to balance the cells.

All About Multi-bank Charging:

Multi-bank charging is a great way to balance series-connected battery systems. Connected positive – to – negative to create a 24 V system, it’s important to make sure that the batteries are kept in balance. T he first battery to deplete will enter low voltage disconnect mode. triggering the other battery as well. You’ll end up with a lower capacity system than you think.

This also applies when your system experiences high voltage disconnects, so taking the se steps will protect your system in either of these extreme situations. If you keep them charged up frequently, they will be more likely to stay in balance because the BMS will internal ly balanc e the system. With this multibank charger, output leads are isolated electrically and are still able to connect each individual lead to each battery without disrupting the charge. They will both be ready for discharge and at a full state of charge.

If you want to purchase a multi-bank charger of your own, we suggest the Dual Pro Professional Series Battery charger for your system. It’s also a popular choice among the bass fishing community. It has a specific algorithm for our batteries and is offered in 2 or 4 output options.

What are the proper charging voltages for the 12V, 24V, and 48V lithium batteries?

Our Battle Born Battery charging parameters consist of the following:

  • Bulk/absorb = 14.2 V – 14.6 V.
  • Float = 13.6V or lower.
  • No equalization (or set it to 14.4V if possible).
  • No temperature compensation.
  • Absorption time is approximately 20 minutes per battery. if possible.
100ah, lithium, battery, charger

For a 12 V system, we really want to emphasize reaching 14.2 V – 14.6 V for bu lk and absorption and float to be 13.6 V or lower.

For a 24V system. we suggest a bulk and absorption rate of 28.4 V – 29.2 V and float to 27.2 V or lower. No equalization is required, but if it’s possible we suggest 28.8 V. No temperature compensation is required either, and absorption time is approximately 20 minutes per battery if that is an option.

For a 48 V system, we recommend a bulk and absorption rate of 57.4V and floating it at 56.5 V to 57 V. Sometimes. one of the batteries may trigger a high voltage disconnect in your system. The battery’s internal BMS will help handle a high voltage disconnect. Our team wants to emphasize that. overall, there’s no harm in playing aro und with charge rates to optimize your system.

How long does it take to charg e lithium batteries ?

One of our most frequently asked questions is “how long does it take to charge lithium batteries?”

Our experts note charging time depends on the specific charger in your system. Lithium-ion batteries have low internal resistance. so they will take all the current delivered from the current charge cycle. For example, if you have a 50-amp charger and a single 100-amp hour battery, d ivide the 100 amps by 50 amps to come up with a 2- hour charging time.

Another example is i f you had five 100 Ah ( amp-hour ) batteries for a total of 500 Ah and a 100-amp charger. It would take about 5 hours of charging from empty to 100 percent while factoring in enough time to balance the charg ing cycle. We don’t recommend you exceed this charge rate as it can lead to a shortened battery cycle life. In an emergency. the battery can be charged at a quicker rate if needed. but we don’t recommend you make a habit of emergency charging your battery.

If you have any additional questions on charging lithium batteries. our YouTube channel and frequently asked questions section on our website offers a wealth of information. Need more help? Please direct your questions to our sales and tech team by giving them a call at 855-292-2831 or send ing an email to [email protected].

How to choose the correct battery charger.

Battery chargers can be confusing and we’re here to show you how to pick the correct charger for the job.

Step 1. Identify the battery type

There are many types of batteries but most commonly in an automotive or recreational setting you will find Lithium, AGM (Absorbed Glass Matt), GEL, flooded or wet batteries, maintenance free Calcium batteries and the more modern EFB (Enhanced Flooded Battery) and Automotive AGM found in modern Stop Start vehicles. The type of battery is always clearly displayed on the battery label located on the top or side of the battery.

Most automotive cranking batteries are either flooded (wet) batteries or Calcium maintenance free batteries. Always check, as some modern vehicles have an AGM style Stop/Start cranking battery. It is important to check your charger is suitable for your battery type and select the correct battery chemistry when charging.

Step 2. Identify the size of the battery you need to charge

The rating of batteries can be confusing and different rating types are used for different batteries. For example:

  • Flooded (Wet) or Calcium are typically rated in Cold Cranking Amps (CCA) and/or Reserve Capacity (RC).
  • Lithium, AGM and GEL batteries are typically rated by a “C” Rating

When it comes to charging, we need to determine the Ampere hours (Ah) of the battery. This is a universal number that helps us understand the size or electrical capacity of a battery. On flooded, wet or Calcium batteries such as start batteries the Ah is often not displayed.

Converting CCA to Ah is not that easy. You should always download the manufactures data sheet to check the correct Ah rating. There is an old rule of thumb where you divide 7.25 into the CCA to determine the Ah of the battery but it’s not always an accurate conversion.

Understanding the “C” rating of a battery can help you determine a lot about the Battery. For example, 100Ah rated at C20. Divide the 20 into the 100 gives you 5 amps. This tells us that the battery is designed to discharge 5 amps for 20 hours until is reaches 10.5 Volts (which is the international test benchmark for dead flat).

If the battery label does not indicate the Ah rating, to get an approximate Amp hour (Ah) rating, multiply the Reserve Capacity (RC rating) x 0.6. E.g. 90 RC x 0.6 = 54 Ah.

Note: These details can be found on the battery label located on the top or side of the battery. If you are unable to find this information, please contact your battery manufacturer.

Step 3. Identify what you need the charger for

Battery charging is when you are recharging a flat or dead battery to full. Battery maintenance on the other hand is when you just want to keep a battery topped up (maintained).

For instance, if you’re storing a motorcycle that you only ride a few times a month but want to ensure it’s ready to go on a sunny afternoon you would require battery maintenance as opposed to battery charging. This is often referred to as trickle charging. All OzCharge ® battery chargers perform both functions and understanding each charger’s limits is important.

Lithium batteries require a specific charge at specific voltages and should never be charged by a battery charger that has not specifically been designed to charge lithium batteries. The OzCharge ® PRO L series of chargers includes a Lithium charge algorithm.

Step 4. Selecting a charger size

As a rule of thumb your battery charger should be 10%. 20% of the Ah rating of the battery.

E.g A 100Ah battery would require a 10 Amp charger as a minimum. To prevent overcharging, you should keep the charger size to within 30% of the total capacity.

In the case of a 100Ah battery that would be a maximum of a 30 amp charger. (For Lithium batteries, refer to your battery manufacturers specifications for maximum charge current as this could be anywhere up to 100% of the Ah capacity)

Please keep in mind that most OzCharge ® battery chargers have selectable current outputs. This function will allow you to use a larger charger on a small battery by reducing the output current to a safe rating.

Find below a list of our best sellers for range of applications:

Review: Redodo 12V 100Ah LiFePO4 Battery


Deep cycle Lithium Iron Phosphate (LiFePO4) batteries are a great alternative to power stations because, for the most part, they cost less in terms of the capacity you’re getting. You’ll still be spending less, even adding on the cost of an inverter and a battery charger. There are also ways to use these types of deep-cycle batteries without an inverter and have a direct connection to what you want to power.

I‘m looking at this Redodo 12V 100Ah LiFePO4 battery in this review. This comes from a well-known brand on Amazon, and their batteries are on the lower price side. I have done a full video review of this battery, but if you want to read a review article and take a look at photos, this one is for you.

What comes in the Box

What you’re getting in the box with this Redodo 12V 100Ah battery are four post bolts, two positive and negative insulated covers, a manual, and a piece of paper that gives you some info about the dos and don’t for the battery. You do not get a battery charger in the box and have to purchase that separately, and that’s not a problem in this case because, in general, batteries like this don’t come with battery chargers in the first place.

Overall, what you’re getting with this Redodo battery is standard for these batteries, and it’s not missing anything vital. Including four post bolts is a great addition; the manual contains rich information, and the paper giving vital info is a nice touch.

Power Capacity

So to get the Watt Hour (Wh) capacity of this Redodo battery, you have to multiply 12V and 100Ah, and you end up with a 1280Wh capacity. So, yes, this Redodo battery does have a 1280Wh capacity, and that’s a lot of power; when you consider a power station with a 1280Wh capacity, you’re looking to spend about 1,000 or more, in this case, you’re spending way less. Go ahead and look at their product page for this battery to see how little you’d pay to get so much capacity.

Of course, with a power station, you get everything already put together and ready to use. Still, as I mentioned, you can choose your inverter and battery charger when you go with a battery like this, which is very low cost. Also, this is a LiFePO4 battery, which can last for about 4,000 charge cycles. LiFePO4 batteries are the way to go because you’re getting your money’s worth, as the battery will last much longer than Lead Acid batteries or regular Lithium-Ion batteries. You’re looking at many years of usage for this Redodo battery.

Also, when it comes to powering appliances for a 1280Wh capacity, you can power a 1W appliance for 1,280 hours or a 1280W appliance for 1 hour. So you have a lot more flexibility when it comes to the longevity of the capacity depending on what appliances you’re looking to power.

MakerHawk Battery Capacity Test

For the capacity test, I used a MakerHawk load test and connected the positive and negative clamps of the load test to the Redodo battery. I set the Voltage to about 12.8V and had the Amps set to about 10 Amps. I ran this test overnight to drain the capacity of this Redodo battery to 0%. After about 9 hours, I returned to the load tester turned off, and the battery was fully depleted of its capacity. What I ended up with was a 103Ah capacity and a 1,298Wh capacity. So on the Amp Hour (Ah) reading, I got a 103% efficiency rating, and on the Watt Hour (Wh) side, I got 101% efficiency. So this Redodo 100Ah battery has a 1280Wh capacity and a bit more, so you’re spending your money wisely for not only the capacity but also the many change cycles that come with a LiFePO4 type of battery.

Also, somebody mentioned in one of my battery capacity test videos that these batteries have a bit more capacity than they say they do to ensure they output the advertised capacity.

Output Charging:

Since this battery has a 1280Wh capacity, it has a 1280W continuous power output and a 1280W max input.

100ah, lithium, battery, charger

For our testing of this Redodo 100Ah battery, I used a Renogy 2000W Pure Sine Wave inverter. To clarify, you don’t have to use a 2000W inverter for this Redodo battery; in fact, using this inverter is way over the top. Instead, I would recommend a 1200W inverter or lower, depending on your budget and needs; however, in this case, I wanted to push this Redodo battery as far as possible to see what it is capable of. Also, when choosing an inverter, make sure that it’s a Pure Sine Wave inverter to ensure that your appliances run the way they’re supposed to.

Heater Test

So for the first test, I did with this battery through the inverter powering a Lasko heater. I had an electricity monitor connected to the inverter to tell me what was happening regarding Watt Hour (Wh) pulled from the battery and the wattage output the appliance was drawing. I set the Lasko heater to low first and ended up with an 850W output; this is not a problem for the Redodo battery to handle as it’s capable of a 1280W continuous power output. After running it at low for about a minute, I set the heater to high, and the output jumped to about 1400W. With a 1400W output, the heater is over the 1280W output of this Redodo battery, but it still keeps running.

I kept running the Lasko heater for 47 minutes until the battery was completely depleted. So you can run a 1400W load from an inverter using this Redodo battery, and it can handle it for nearly an hour. Also, I got an AC capacity of 1,100Wh, which is a 86% efficiency rating when it comes to using an inverter with the battery; this type of conversion through an AC outlet is better than most power stations.

Electric Cooktop Toaster Oven Test

For the next test, I used a 1000W electric cooktop and placed a saucepan with four cups of water on top to see how fast I could boil water and how much capacity I use up. The cooktop pulled about 950W; it took about 8 minutes for the water to boil and used up 120Wh of the Redodo battery’s capacity. So you can easily cook with a high enough wattage inverter using this battery, and you won’t lose much capacity.

For the final test, I used a toaster oven to power from this battery and inverter. I set the toaster oven to 450 ° F and had to run it for about 10 minutes. The toaster oven pulled 1170W and used about 120Wh capacity from this Redodo battery. So you can easily have food toasted with this battery, too.

Overall, a 12V/100Ah battery is best to own. Going lower on the Amp Hour (Ah) scale means having lower wattage usage and less capacity to use, which ultimately means a shorter runtime. Going with a higher capacity battery means spending more, but at the same time, you get so much more capacity and wattage usage. That said, 100Ah batteries are the sweet spot for price and function.

Recharging the Battery:

You can use any 14.4V or 14.6V battery charger to recharge this Redodo 100Ah battery. In my case, I used an Ampere Time 10 Amp battery charger to recharge the unit. This is one of the lowest-cost battery chargers you can get, but it’s also one of the slowest ways to recharge. This Ampere Time 10 Amp battery charger works the same way as any other one. I just attached the negative and positive clamps to the negative and positive terminals on this Redodo battery, and it began charging.

The light on the Ampere Time battery charger turns red to indicate that it’s charging, and then it turns green to indicate that the battery is fully recharged and charging stops. Of course, as I mentioned before, a 10 Amp battery charger is relatively slow, and going from 0% to 100% will take about 10 – 12 hours.

Size and Weight:

This Redodo 100Ah battery has a length of 13 inches, a width of 6.7 inches, and a height of 8.4 inches. The battery weighs 25 pounds. So it’s not a large battery, but it has some weight. The battery does have a handle strap that makes it easier to move around, and you can also easily remove the handle if you want.

Functional Components:

In this case, when it came to using the battery with the Renogy 2000W inverter, I connected the negative and positive terminal cables from the inverter to the battery. Once the terminal ends were screwed onto the battery, I could turn on the inverter and power the appliances.

Structure and Material:

The build quality of this Redodo battery is good. The battery has an IP65 water resistance rating, meaning it can withstand rain and high-pressure jets but cannot withstand water submersion. The casing is solid, and I couldn’t find any flaws with its build quality. However, you shouldn’t drop this battery, as I’m not sure if the casing can survive a fall, as most batteries are not exactly built up to that standard.


For the technical build, this Redodo battery has overcharge, over-discharge, temperature, short circuit, and all other protections to ensure that it performs smoothly and that you’re safe. In my heater test, when I had the heater running at about 1400W, this battery could keep supplying power to the Renogy inverter. If the battery got too hot, it would automatically shut off, but that didn’t happen in my test, as it could fully deplete its capacity.


The testing I’ve conducted from the MakerHawk load tester and the Renogy inverter shows that this Redodo 100Ah battery is very reliable. It has the capacity it says it has a little more. Also, it uses a LiFePO4 battery cell which gives many charge cycles that allow the battery to last for many years. On the inverter side, I could power a Lasko heater at 1400W, above the 1280W that this battery is capable of. The inverter AC capacity pulled 86% efficiency from this Redodo battery.

So, this is very reliable for a 100Ah LiFePO4 battery.


This 1280Wh capacity is precisely what you’re getting, and just a bit more because of the load test I ran. This battery can also handle loads over its 1280W max continuous output, as I ran a 1400W load for nearly an hour.

This battery is pretty small, but it does weigh 25 pounds. The removable handle does make it easier to carry the battery. Connecting the inverter was very easy, and recharging was simple, too.

The build quality of this Redodo battery is solid because of its IP65 water resistance rating. It also has many technical protections that ensure it will be safe, such as overload, short circuit, and temperature control protections.

If you want an all-around reliable battery, a 100Ah battery is the one to go with, as it has tons of capacity, power input, and output capabilities, and it comes at an affordable price compared to a 1280Wh power station.

Redodo 12V 100Ah LiFePO4 Battery Specs


This Redodo 12V 100Ah LiFePO4 battery is an excellent choice because it’s exactly what it says it is. This 1280Wh battery can supply more than 1280W of power through an inverter; of course, you shouldn’t do that frequently with a battery like this, but I was able to run 1400W for almost an hour. Also, for a 1280Wh capacity and even adding on the cost of an inverter and a battery charger, this Redodo battery can be a better choice than an equivalent power station.

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