Description

This is a 2S Lithium Battery Pack built using 2100mAh 18650 cells. All the cells are connected in series and thus provide a nominal output voltage of 7.4 V volts. The battery pack consists of an in-built BMS which ensures safe operation of the cells during charging and discharging.
How to charge this battery pack?
The battery pack can be charged and discharged using same wires. To charge the battery just connect it to 8.4V (4.2V per cell)  DC power supply ,Connect positive to red wire and ground to the black wire. Monitor the increase in the voltage with time and stop charging after the pack has reached more than 8.2V.
When to charge the battery pack?
Disconnect the cells from the load when the voltage has dropped to 6V (3V per cell) or below and charge them before you can use them again. Over discharging the cells might damage them permanently.
 
Note: Lithium batteries can become unstable, if not handled properly, resulting in heat or fire. Safety precautions and prior knowledge is advised.