If you own an Mobile Phone for Phone that isn`t holding its charge, now is the time to get your battery replaced. Contact CTECHI, we will provide phone battery for you .and this battery is 3.8V 1940mAh original battery, you can buy both cell or battery, depend on you , we have both. Do you feel very crazy, the phone will soon have no electricity, can not find the charger, urgent things can not be handled. CTECHI can solve this problem, just come and replace it. If you are a local dealer, please consult. About the Cell Capacity, The capacity means the discharge capacity of the cell, which is measured with discharge current of 0.2Cmin with 3.0V cut-off voltage after the standard charge. Test temperature: 25°C±3℃. About the RT Cycle Life. Charge cell with detailed specifications current and discharge cell with 0.5Cmin current until battery voltage reaches 3.0V. Repeat to 500 ≥ cycles, record remained capacity of 500th cycle. Test temperature: 25℃±3℃.