Its 1260110 9000mAh 3.7V Li-Po Rechargeable battery, It is high power high backup battery with lightweight. This 3.7V battery has a high capacity of 9000mAh. It comes with BMS to prevent overcharging or discharging and provide overload protection to the battery. These Batteries are frequently used in DIY and commercial applications as well as in GPS devices, power banks, MP3 players, FM radios, Bluetooth speakers, and IoT. Power bank, compact UPS, Medical devices, GPS etc.