Specifications：High-concerned chemical:None：Package:Yes：Type:Standard Battery：Rechargeable:Yes：Model Number:CS-ATB440TW：Use:Two-Way Radio Battery：：Origin:Mainland China：Certification:CE：Compatible model:：For：AnyTone：AT-D868UV：AT-D780：Part No.:：QB-44H：QB-44L：Specifications:：CS-ATB440TW：CategoryTwo-Way Radio：Capacity2900mAh：TypeLi-ion：Voltage7.4V：Rate21.46Wh：ColorBlack：Dimension97.30 x 56.00 x 33.90mm：EAN Code4894128187639：Net Weight138.0g / 4.87oz：Gross Weight208g / 7.34oz：We guaranteed:： >Delivery reliable,optimal performance! Considerate service! >Best price and Good quality!：Using Tips:：1.Terminate any applications that are not in use.：2.Switch the vibration off and reduce ring tone and screen timeout.：3.Avoid exposing the battery to liquid or subject to strong mechanical shocks.：4.You can use the Baixt External Battery to make your cell phone battery life last longer.：5.Avoid overcharge and over discharge. Please stop charging when the battery is 100% charged.：6.Avoid exposing to high temperatures 140°F/60°C. Keep the battery power between 5%-95%.：7.Do not short-circuit the battery.Accidental short-circuiting can occur when a metallic object such as a coin clip,or pen causes direct connection of the positive(+) and negative(-) terminals of the battery short-circuiting the terminals may damage the battery of the connecting object.