when working with Li-ion cells, they are very sensitive to charging characteristics and may explode if mis-handled.User should have enough knowledge on Li-Ion rechargeable batteries in charging, discharging and assembly before use.We are not responsible for any damage caused by misuse or mishandling of these Li-Ion batteriesDon't leave battery unattended during chargingDon't put battery on wood surface or carpet or near flammable materials during charging