The battery level percentage is also a very good visual indication of the charge level of your battery. Uses. At present, the highest capacity of the 18650 battery is about 3500mAh and 13Wh, and the 21700 battery is about 5100mAh and 20Wh. After investigation, the rated capacity of power bank allowed to be carried by aircraft does not exceed 100Wh, so the PB2S and four large-capacity 21700 batteries can be carried on the aircraft, and can also guarantee the consumption of many devices for at least one day. By connecting the adapter and inserting the cells, the charger will automatically start charging. The input supports most of the fast charging protocols. When fast charging, the input current and voltage will be 9V 2A, and the charging current will be 2A x 2/2A x 1. When not fast charging, the input current and voltage will be equal to 5V 2A, while the recharge current will correspond to 2A x 1/1A x 2.

Professionel processorstyret oplader til Li-ion 18650/20700/21700/26650 celler med powerbank funktion

The Fashionable Lightweight Power Bank

Charging is done simply via a USB-C Cable, XTAR supply this cable (which measures 80.0cm in length) which can also double up us a USB-C output cable to your USB-C device using the USB output port. Over-Charge: Charging a battery beyond its full level leads to permanent or temporary damage of the battery. (Source Quora) The PB2S data shows a slight deviation from the tester. Taking into account the input and output status, the internal resistance of the charging cable and other factors, the reading is relatively accurate. The power bank can easily deliver the rated 2A with fresh batteries and it has overload protection around 2.7A.

Insert one or two cells and connect the USB device, the charger will automatically charge the external USB device. The output supports most of the fast charging protocols. In case your device does not support fast charging, by default the output current and voltage of the charger will be 5V 2A. If the device supports fast charging, the charger will adjust the output power according to the device in question. The maximum output power is 18W.

Preview

Take out the battery and measure it with a multimeter. The voltage is 4.2V. The PB2S controls the charging cut-off voltage very well, and will not cause danger due to overcharging. It took 2h 5min and 21s. Two 21700 4200mAh batteries were fully charged. The PB2S showed an input current of 0A. At this time, the voltage remained at 12V and the charging speed was very fast.

After inserting the battery and pressing the side button, the display shows "OUT1" as output with a battery charge percentage of 98%.

By pressing the side button and going to slot n.2, the display shows the estimated volts, in real time, of the battery being recharged as well as the 1.7A charging current. The battery XTAR supplied me was their own branded battery. It’s an INR 18650 2600 High-drain Li-ion Battery. Below is table of the capabilities of this battery. In the tests I made to recharge batteries in 18650 and 21700 format I obtained good results managing to charge a 3000mAh Sony murata VTC6 18650 battery in about 3 hours (at 1.7A max.) and a 21700 battery in a 4900mAh XTAR in about 3h50min (2A). Compatible with 3.6/3.7V Li-ion IMR/INR/ICR 18650/20700/21700 rechargeable batteries (protected and unprotected) Taking into account the error of the instrument, the PB2S's judgment on the charging of different batteries is accurate, and the basic control is within 4.2V of the full charge. The deviation will not be too much.

Let's see the display with a Samsung 21700 inserted in slot n.2 of the PB2S before and after starting the recharge. In the event of a short circuit or reverse polarity, the charge current and battery percentage will both be 0.The USB output port of PB2S doesn’t support QC3.0 and PD protocols, and the output voltage is about 5V.