Specna Arms 11.1V 1200mAh 20C/40C Li-Po Battery AK Stick - Small Tamiya

To avoid damage to the battery, never exceed the charging current of 1C (0.9A)
Use an appropriate charger that allows the current to be adjusted.

1) Use special caution when working with Li-Ion/Li-Po/Li-Fe cells, they are very sensitive to charging characteristics and may explode if mishandled
2) Make sure user has enough knowledge on Li-Ion rechargeable batteries in charging, discharging and assembly before use
3) Put the batteries in fire-proof container in Charging / Store / Transfer
4) Never leave batteries unattended when charging
5) Do not use the battery Li-ion if it was damaged.