This SHAWOROCE rechargeable battery has a built-in overcharge protection circuit to extend battery life and make charging safer. It has a built-in 700mah capacity, providing longer talk and standby times. This battery is made with high-quality Li-ion cells for long lasting performance. It is designed for use with VXI Blueparrott Bluetooth Headset Intercom B250-XT Camera Mobile Phone Video GPS +3 JST Plugs.