Power bank minimum current. What Is A Power Bank Used For?

Top 10 Best Power Bank Portable Chargers Compared for 2023

The best power bank should be light, portable, and capable of quickly charging all your devices. However, there are dozens of different models on the market, with varying levels of power capacity as well as different outputs and charging speeds.

To help you find the best power bank portable charger for you, we’ve reviewed and compared the 10 most popular models, looking at their charging efficiency, dimensions, and value for money, so you can make an informed decision and make the perfect pick.

The 10 Best Portable Power Banks Shortlisted

Here’s our list of the best power bank models in 2023:

  • INIU Charger 10k mAh— Best portable power bank with a USB-C input/output port, 15-layer safe charging, TempGuard, and a 3-year Care Plan.
  • Anker PowerCore Essential 20k mAh — Fast 2.4A charging with PowerIQ and VoltageBoost technologies, with trickle-charge mode for low-power devices.
  • Miady 2-Pack 10k mAh — Two super-efficient power banks for the price of one. Safe to use with virtually any smartphone and fully rechargeable in just 5 hours.
  • Anker PowerCore 20100 mAh — Sleek design and incredible power capacity, with two USB-C output ports for super-fast charging.
  • Romoss 30k mAh — Best fast-charging power bank with three inputs and outputs, ideal for simultaneously charging your smartphone, iPad, and Nintendo Switch.
  • Anker PowerCore 10k mAh — Affordable and compact, perfect for charging your phone when going on an all-day hike or camping.
  • BLAVOR Solar Charger 10k mAh — Best solar power bank with a powerful dual LED flashlight, perfect for outdoor enthusiasts.
  • Miisso 4.5k mAh — Petite and powerful, compatible with all iPhone models, iPads, and Airpods, as well as most wireless headsets and Bluetooth speakers.
  • Anker 747 26k mAh — Great power bank for laptops, with an 87W max output, great heat dissipation, and a three-point protection system.
  • Anker 626 MagGo — Wireless portable charger for newer iPhones, with a strong magnet, a foldable stand, and a USB-C In/Out port.

Reviews of the Top Power Bank Chargers

Here are detailed reviews of the best power banks on the market, so you can see how powerful different models are and what devices they’re comfortable with. This will help you make an informed decision and choose the one that’s best for you.

INIU Charger 10k mAh — Best Portable Power Bank With a USB-C Input/Output Port

The INIU Charger is one of the most versatile power banks on the market, capable of charging a wide variety of devices, such as smartphones, iPads, Airpods, and Bluetooth headsets.

This INIU power bank is among the 5% of portable chargers on the market that feature a USB-C input and output port. While most power banks can only be recharged via the USB-C port, the INIU Charger also lets you recharge all your USB-C-compatible devices directly.

Additionally, the INIU Charger features the 3A fast-charging technology, so you can charge your iPhone or Android smartphone from 0% to 78% in just one hour. This is twice as fast as power banks with 2.1A charging.

Not only does the INIU power bank charge your phone super-fast, but it also helps protect your phone’s battery. It features a proprietary 15-layer SmartProtect system alongside TempGuard to eliminate the risk of overheating and battery damage, so your device will function optimally for years to come.

Another advantage of this super portable power bank is that it is only 0.5″ thick and weighs just 7 ounces. You can easily slip it into your. backpack, or traveling bag and take it with you wherever you go.

To top it all off, the company offers a three-year care plan for the INIU Charger, offering a replacement on the off chance that it stops functioning properly during that time period.

Pros

  • USB-C output
  • 3A fast charging
  • 15-layer safe charging and TempGuard
  • Can charge up to three devices simultaneously

How to Prototype a Power Bank Charger Without Building Any Dedicated Hardware

The short answer to this question is yes, and, as this question has been asked by many customers over the years, this article was written to explore the topic in further detail. This article will review the process involved in developing an application using existing evaluation boards, discuss the challenges encountered, and outline recommendations for further revisions and improvements.

Introduction

Ideally, any power supply design should start with some basic proof of concept tests, which often involve testing an existing demo board. This demo simply takes this preexisting step (of testing single rails on the demo hardware) and expands on it to produce a working system using demo hardware. Furthermore, as this demo was needed within a relatively short time frame, the typical development process of design, layout, build, assemble, and test (plus any design iteration) was not possible, so the system was prototyped in its entirety using nothing but readily available hardware.

Application

To answer the question posed at the beginning of this article, it was necessary to choose a high level application as a starting point to prove this was possible. This led to the power bank charging application being selected as a proof of concept. As power management is a prerequisite for every electronic project, any other application could have been selected.

power, bank, current, used

A power bank charger is a common enough application, which most consumers have encountered and used—for example, many travelers carry one to ensure their phone remains charged over a long journey. A power bank is essentially a battery pack (capacity varies depending on the price and range required), with one or more USB-A ports as well as a USB-C input port to charge it. It is possible of course to layer additional complexity on top of this basic functionality—for example, the addition of a wireless charging pad or an input to allow solar charging of the bank for outdoor enthusiasts.

For this application, the option to charge the battery via solar or to charge via a DC input from a standard 12 V AC-to-DC wall wart was included. The outputs included some basic USB-A charging ports (two in total), producing 5 V for use with mobile phones and a range of USB-powered electronics.

Power Source Selection—LTC4416

In this example, the design will support two input power sources (a solar panel and an AC-to-DC wall wart, which is just a simple AC-to-DC power supply). For this reason, a clever device called a power path prioritizer is required not only to intelligently switch between the available sources depending on which was available but also to manage the situation where they both were available by assigning priority to one source or the other. A simple version of this implementation can be achieved by using some simple diodes—commonly connecting the two cathodes of the diodes and connecting the anodes to their respective sources. Unfortunately, this particular configuration is lossy due to the diode drop inherent in a typical diode (approximately 0.6 V), but it also doesn’t allow for any clever selection criteria to be implemented, for example, priority selection. It simply allows the higher potential input to pass through.

Here LTC4416 comes into play—it not only replaces the lossy diodes with PFETs, which are far more efficient, but also allows for priority to be assigned. In this particular application, priority will always be assigned to the wall wart. This allows the design to take advantage of the available power (and higher current) when it is available. This device is exceptionally flexible, with many operational modes possible depending on the design requirements. Table 1 (sourced from the LTC4416 data sheet) displays the modes of operation.

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.

power, bank, current, used

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.

The Best Solar Power Station With Jackery

Jackery portable power bank is a renewable and rechargeable battery-powered generator. The solar power generator teams up with solar panels to collect solar energy, transform it into electricity, and charge appliances.

Jackery solar generators are easy-to-use charging sources. All you need to do is connect portable power stations with solar panels and keep them under the sun to convert sunlight into electricity. Then, the inverter converts the electricity into the form that powers your devices.

Jackery provides a wide range of portable power banks to meet your needs. Below we have mentioned our three picks for you to power appliances.

Jackery Explorer 2000 Pro combines with SolarSaga 200W panels to charge all your small and large electrical appliances. With a high battery capacity of 2160 Wh, Jackery Solar Generator 2000 Pro can power most outdoor devices and tools, including smartphones, laptops, e-bikes, mini coolers, etc. You can fully charge the power bank using 6 SolarSaga 200W Solar Panels in 2.5 hours, while it takes only 2 hours to charge it using the AC wall outlet. With only a push button, you can access limitless power.

Input Output Ports

Solar Charging Time

Appliances Charging Time

Jackery Explorer 2000 Pro

15.1 x 10.5 x 12.1in (38.4×26.90 x30.75 cm)

power, bank, current, used

4AC, 1 Carport, 3 USB, 1 USB-C, 1 QC3.0, 1 USB-A

Takes 2.5 hours to recharge with Explorer 2000 Pro and 6x SolarSaga 200W solar panels.

Light(13W) 100H, TV(60W) 22H, Cooler(21W) 70H, Heating Blanket(40W) 68H, Coffee Maker(1000W) 2.2H, Electric Stove(1150W) 90Min

Jackery Solar Generator 1500 combines Explorer 1500 power station and SolarSaga solar panels. It features a massive 1534 Wh capacity battery that can charge 85% of your home electrical appliances. Thanks to the Solarpeak™ technology (upgraded MPPT technology), the power bank allows you to charge the battery from zero to 80% in just 4 hours.

Input Output Ports

Solar Charging Time

Appliances Charging Time

Jackery Solar Generator 1500

14 x 10.4 x 12.7 in (35.6 x 26.4 x 32.3 cm)

3AC, 1 USB-C, 1 QC3.0, 1 USB-A, 1 CARPORT

Takes 4 hours to recharge with Explorer 1500 and 4x SolarSaga 100W solar panels.

Mini Cooler (60W) 21H, Ice Shaver (700W) 120 Min, Toaster (650W) 130 Min, Microwave Oven (1000W) 68 Min, Electrical Grill (900W) 75 Min, Coffee Maker (500W) 130 Min.

Jackery Explorer 1000 Pro is faster and can charge fully in 1.8 hours. Thanks to its lighter body and foldable handle, the Jackery Explorer 1000 Pro is easy to transport and store. The pure sine wave inverter can supply stable power to charge appliances. Another unique feature of the solar power station is its low self-discharge rate, which allows it to last 365 days from an 80% battery level.

Input Output Ports

Solar Charging Time

Appliances Charging Time

Jackery Solar Generator 1000 Pro

13.39 x 10.32 x 10.06 in (34 x 26.2 x 25.5cm)

3AC, 2 USB-C, 2 PD Ports, 2 USB-A, 1 DC Carport

Takes 1.8H to recharge with Explorer 1000 Pro and 4x SolarSaga 200W Solar Panel

Light(13W) 60H, TV(60W) 13H, Cooler(21W) 34H, Heating Blanket(40W) 35H, Coffee Maker(1000W) 4H, Electric Stove(1150W) 40Min

FAQs About Power Banks

Indeed, solar power banks are the best investment for people who love outdoor adventures. To ensure that you choose the best solar power bank, here are a few other things you should be aware of.

How do I know my power bank capacity?

Understanding how long the battery will last (battery capacity) is essential when you shop for a power bank. A simple formula that can help you comprehend which power bank capacity is suitable for your device is the ratio of the battery capacity of the power bank and the electrical device.

Suppose the power bank has 20,000 mAh; you can divide it by the mAh of your device that needs charging to calculate power bank capacity.

How to extend the power bank lifespan?

Power banks have average charge cycles of 300-500. There are several ways by which you can extend the power bank lifespan.

  • Charge power bank when not in use:Rechargeable batteries like power banks age faster, no matter if you use them or not. But you can slow the aging process by charging it before storing it.
  • Don’t drop the power bank: Portable power stations consist of a battery, circuit board, and other components. That said, you should handle it with care.
  • Don’t expose it to high temperatures: When batteries are exposed to extreme scenarios, they lose their energy faster and pose safety threats.

What is mAh capacity?

mAh (or milliamp-hours) capacity measures how much charge the battery can hold. Additionally, it represents how long it can power another appliance before you need to recharge it.

power, bank, current, used

What are the benefits of a solar power bank?

Jackery solar power banks convert sunlight into electricity to charge appliances. The lightweight and adaptable green generators can power anything, including but not limited to smartphones, mini-refrigerators, lights, laptops, and even electric warmers. There are many benefits to owning a solar power bank:

  • Easy to Use:Unlike traditional generators, solar power banks are easy to use. The one-button operation makes Jackery solar generators a reliable power source.
  • Portable: Jackery solar generators are more portable than gas or traditional solar systems. The lightweight nature and foldable handle make it an excellent choice for camping.
  • Eco-Friendly: As solar power banks use sunlight to generate electricity, they provide clean energy without toxic emissions.
  • Quiet:Jackery solar generators operate without any noise. Whether you’re using it to power smartphones or large appliances, you don’t have to worry about noise.

Final Thoughts

Investing in solar banks can make your camping, traveling, and outdoor adventures stress-free. In addition, it is a reliable power source for your smartphones, tablets, and other electronic devices.

Now that you know what is a power bank, its benefits, and how it works, it’s time to choose the right solar generator.

Jackery Solar Generator combines Explorer power station and SolarSaga solar panels that power all your gear. As sunlight is a clean and reliable energy source, you can never run out of power with a solar power bank.

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