3.7V 2600mAh Rechargeable Li-ion Battery, PH2.0 2-Pin Connector, Replacement ...

Perfect backup power for versatile household and hobby applications. Compact size (66x16x21mm) with lightweight 46g design ensures portability without sacrificing performance. Equipped with aPH2.0 2-pin connector, this battery allows for easy installation and secure connection in compatible devices.

eBay