Specifications Hign-concerned Chemical:None Size:135*39*20mm Set Type:Batteries Only Type:Li-Ion Nominal Capacity:12800mAh Model Number:For ILIFE battery Brand Name:avtark Origin:Mainland China Certification:CE,FCC,RoHS,KC Certificate: Compatible model: For ILIFE V3s Pro, V50, V5s Pro, V8s, X750 Part No.: Ay-18650B4 Specifications: Voltage: 14.4V Capacity: 2600mAh--12800mAh Dimension: 132.22 x 37.32 x 20.74mm Cameron sino model Li-ionbattery 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 charged. 6.Avoid exposing to high temperatures 140F/60C. 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.