This battery pack is made of best quality tested  Lg hg2 Lithium-Ion Batteries and BMS circuit. It is very small in size and weight compared to Ni-Cd, Ni-MH, and Lead Acid Batteries. With the inbuilt Charge protection circuit, the battery pack can be directly charged with the  specialized battery chargers and there is no worry about overcharging.

It is the ideal battery pack for googles and transmitter.