RightBattery.com

The Folomov A1 is a compact and convenient USB charger for various single cell Li-ion batteries such as: 26650, 21700,20700,25500, 22650, 18700, 18650, 18500, 18490, 18350, 17670, 17500, 17335, 16340, 14650, 14500, 10350 and 10340. The device uses standard USB port from a computer or a USB charging adapter to charge Li-Ion batteries with 1A max charging current. The positive and negative charging terminals of the device have magnets, so they are very easy to clip on the battery sides and charge the battery. The device can automatically activate 0V battery, comes with over current charging and discharging protection, constant current and stable voltage charging mode and reverse polarity protection. What is most interesting and the reason we are testing this device is that it can also double as a power bank, using a Li-Ion battery as a source of power to charge your USB devices and not only charge batteries. Let us see how well does the Folomov A1 Magnetic Charger work as a power bank with 5V/1A output used together with a 2900 mAh Panasonic NCR18650PF Li-ion battery that we have previously charged with the A1 as well…

The Folomov A1 Magnetic Charger does work pretty well in terms of delivering a little over 1600 mAh capacity from the 2900 mAh Li-ion battery used, however we are not very satisfied with the voltage curve we are seeing. Keeping 4.8V-4.9V output voltage for about the first 1 Amp and then gradually starting to drop after that, resulting in lower Wh output, making the result not so satisfying. Still the Folomov A1 does work quite well both ways for charging Li-ion batteries as well as functioning as a power bank getting powered form a Li-ion battery. If it handled the discharge with a bit more stable voltage output it would’ve been even better, and if the positive and negative clips of the charger were with a bit stronger magnets and flatter surface for better contact it could’ve been even better. Still decent results and performance for this compact and cheap multi functional deice that can be quite handy to have in your bag if you are dealing with Li-ion battery cells often.

The performance of the 2900 mAh Folomov A1 Magnetic Charger and Power Bank in our tests:

– 1614 mAh at 1.0A load

– 7.703 Wh at 1.0A load