# What is 2200mah battery. Example 2: LiFePO4 Battery

## Battery Charge Time Calculator

Use our battery charge time calculator to easily estimate how long it’ll take to fully charge your battery.

Tip: If you’re solar charging your battery, you can estimate its charge time much more accurately with our solar battery charge time calculator.

### How to Use This Calculator

Enter your battery capacity and select its units from the list. The unit options are milliamp hours (mAh), amp hours (Ah), watt hours (Wh), and kilowatt hours (kWh).

Enter your battery charger’s charge current and select its units from the list. The unit options are milliamps (mA), amps (A), and watts (W).

If the calculator asks for it, enter your battery voltage or charge voltage. Depending on the combination of units you selected for your battery capacity and charge current, the calculator may ask you to input a voltage.

Select your battery type from the list.

Optional: Enter your battery state of charge as a percentage. For instance, if your battery is 20% charged, you’d enter the number 20. If your battery is dead, you’d enter 0.

Click Calculate Charge Time to get your results.

## Battery Charging Time Calculation Formulas

For those interested in the underlying math, here are 3 formulas to for calculating battery charging time. I start with the simplest and least accurate formula and end with the most complex but most accurate.

### Formula 1

Formula: charge time = battery capacity ÷ charge current

Accuracy: Lowest

Complexity: Lowest

The easiest but least accurate way to estimate charge time is to divide battery capacity by charge current.

Most often, your battery‘s capacity will be given in amp hours (Ah), and your charger’s charge current will be given in amps (A). So you’ll often see this formula written with these units:

charge time = battery capacity (Ah) ÷ charge current (A)

However, battery capacity can also be expressed in milliamp hours (mAh), watt hours (Wh) and kilowatt hours (kWh). And your battery charger may tell you its power output in milliamps (mA) or watts (W) rather than amps. So you may also see the formula written with different unit combinations.

charge time = battery capacity (mAh) ÷ charge current (mA) charge time = battery capacity (Wh) ÷ charge rate (W)

And sometimes, your units are mismatched. Your battery capacity may be given in watt hours and your charge rate in amps. Or they may be given in milliamp hours and watts.

In these cases, you need to convert the units until you have a ‘matching’ pair.- such as amp hours and amps, watt hours and watts, or milliamp hours and milliamps.

For reference, here are the formulas you need to convert between the most common units for battery capacity and charge rate. Most of them link to our relevant conversion calculator.

Battery capacity unit conversions:

• watt hours = amp hours × volts
• amp hours = watt hours ÷ volts
• milliamp hours = amp hours × 1000
• amp hours = milliamp hours ÷ 1000
• watt hours = milliamp hours × volts ÷ 1000
• milliamp hours = watt hours ÷ volts × 1000
• kilowatt hours = amp hours × volts ÷ 1000
• amp hours = kilowatt hours ÷ volts × 1000
• watt hours = kilowatt hours × 1000
• kilowatt hours = watt hours ÷ 1000

Charge rate unit conversions:

The formula itself is simple, but taking into account all the possible conversions can get a little overwhelming. So let’s run through a few examples.

### Example 1: Battery Capacity in Amp Hours, Charging Current in Amps

Let’s say you have the following setup:

• Battery capacity: 100 amp hours
• Charging current: 10 amps

To calculate charging time using this formula, you simply divide battery capacity by charging current.

In this scenario, your estimated charge time is 10 hours.

Tip: You can estimate how much battery capacity you need by using the inverse of this formula: amps × hours = amp hours.

### Example 2: Battery Capacity in Watt Hours, Charging Rate in Watts

Let’s now consider this scenario:

Because your units are again ‘matching’, to calculate charging time you again simply divide battery capacity by charging rate.

In this scenario, your estimated charge time is 8 hours.

### Example 3: Battery Capacity in Milliamp Hours, Charging Rate in Watts

Let’s consider the following scenario where the units are mismatched.

First, you need to decide which set of matching units you want to convert to. You consider watt hours for battery capacity and watts for charge rate. But you’re unable to find the battery’s voltage, which you need to convert milliamp hours to watt hours.

You know the charger‘s output voltage is 5 volts, so you settle on amp hours for battery capacity and amps for charge rate.

With that decided, you first divide watts by volts to get your charging current in amps.

Next, you convert battery capacity from milliamp hours to amp hours by dividing milliamp hours by 1000.

Now you have your battery capacity and charging current in ‘matching’ units. Finally, you divide battery capacity by charging current to get charge time.

In this example, your estimated battery charging time is 1.5 hours.

### Formula 2

Formula: charge time = battery capacity ÷ (charge current × charge efficiency)

Accuracy: Medium

Complexity: Medium

No battery charges and discharges with 100% efficiency. Some of the energy will be lost due to inefficiencies during the charging process.

This formula builds on the previous one by factoring in charge/discharge efficiency, which differs based on battery type.

## Product Details

Pilots and drivers enjoy more Smart benefits with Spektrum™ Smart G2 50C LiPos. Not only are charging parameters and performance data stored and uploaded automatically to Smart chargers, but no balance lead is needed — just one easy IC® connection!

Key Features

• Powerful 50C continuous discharge rating to deliver high performance and longevity
• Balance charge through the IC3® or IC5® connector data wire — with only one connection, no balance lead required
• Faster Auto Discharge at up to 1.5A to safe storage voltage for long battery life and improved performance
• Integrated microchip stores unique parameters for each battery
• Spektrum Smart Charger Required

Instruction Manual

### Overview

Drivers and pilots enjoy even more Smart advantages when using Spektrum ™ Smart G2 50C LiPo batteries to power their vehicles. New Generation 2 features make these LiPo packs — featuring a 50C continuous discharge rating for high performance and longevity — even simpler and safer to use together with your Smart charger.

For example, Spektrum ™ Smart G2 technology makes it much easier to balance charge your LiPo batteries. Balancing information travels through the unique data wire of each Smart G2 battery‘s innovative IC3 ® or IC5 ® connector. As a result, only a single connection is needed — no separate balance lead is required.

Smart G2 batteries come from the factory programmed to discharge automatically to a safe storage voltage of 3.90V after 72 hours of inactivity. The benefits include longer battery life, better performance over the life of the pack, and the peace of mind that comes from knowing your Smart battery is maintenance-free. You can change the battery’s Auto Storage settings based on your own preferences. G2 batteries also offer a storage discharge rate that’s three times faster than the previous G1 Smart batteries.

Smart G2 30C soft-case LiPo packs also include thicker internal metal side plates. These plates improve heat dissipation and provide more protection for the cells against punctures during rough landings or in similar impact-prone situations.

As with other Smart batteries, you’ll never have to set your own charging preferences for a Spektrum ™ Smart G2 battery until you want to. When a Smart G2 LiPo battery is connected to a Spektrum ™ Smart charger, its unique charging parameters and health information upload to the charger from the battery‘s integrated memory microchip. Through the charger you can view and set preferences such as charge rates, so all that’s required to charge the pack is connecting it to your Smart charger. Smart technology takes care of the rest.

Spektrum ™ Smart G2 50C LiPo batteries store a wide variety of essential information, including:

• Battery Brand
• Battery Type
• Battery Capacity
• Battery C Rating
• Individual Cell Voltage
• Battery Temperature
• Charge/Discharge Cycles

Spektrum ™ Smart G2 LiPo 50C batteries also maintain an error log including the number of over-heat, over-discharge and over-charge incidents. This data can be helpful in assuring that the battery you’ve chosen is right for the application. Innovative Spektrum ™ Smart G2 LiPo 50C batteries are so easy to use, they nearly take care of themselves. It’s easy to achieve peak battery performance, reliability and longevity with Smart G2 technology!

Note: Smart G2 batteries require the use of a Spektrum Smart Charger. Update your Spektrum Smart Charger for all the latest advancements in Smart Technology.

### Features

• Simpler and safer to use
• Powerful 50C continuous discharge rating to deliver high performance and longevity
• Balance charge through the IC3 ® or IC5 ® connector data wire — with only one connection, no balance lead required
• Faster Auto Discharge at up to 1.5A to safe storage voltage for long battery life and improved performance
• Thicker internal metal side plates protect cells and improve heat dissipation
• Integrated microchip stores unique parameters for each battery
• IC3 ® and IC5 ® connectors are also compatible with EC3 ™ and EC5 ™ styles
• Spektrum Smart Charger Required

## Gens Ace 25C 2200mah 11.1V 3S Lipo Battery Pack With XT-60 Plug

Gens Ace 2200mAh 11.1V Lipo battery is one of the top rank battery corporations with deep research and manufacturing on NIMH, LI-PO, LI-FE by the effort of 200 professional engineers and technicians with 20 years exquisite battery technology. The Gens Ace brand holds the traditional concept of excellent quality, Optimization Priority on Sales Services. All batteries are tailored for various scales of the RC Models such as electronic cars, nitro cars, airplanes, vessels and also other models, toys, electric tools, electric bikes, electric autos, digital products etc.

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If you need to return an item, simply login to your account, view the order using the Complete Orders link under the My Account menu and click the Return Item(s) button. We’ll notify you via e-mail of your refund once we’ve received and processed the returned item.

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Please also note that the shipping rates for many items we sell are weight-based. The weight of any such item can be found on its detail page. To reflect the policies of the shipping companies we use, all weights will be rounded up to the next full pound.

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