18650 li-ion batteries 3.7v 2600mah lithium bateri

Cautions:

1.Li-ion cells are very sensitive to charging characteristics and may explode if mis-handled. 
2.Make sure user has enough knowledge on Li-Ion rechargeable batteries in charging, discharging and assembly before use. 
3.We are not responsible for any damage caused by misuse or mishandling of these Li-Ion batteries 
4.Strongly suggest that you use our smart Li-Ion battery charger to recharge the battery pack   
5.Never use conventional DC adapter to charge the battery module.
6.Please don't make parallel connection with more than  three modules to avoid uneven charge.