For BEST SONNY LT416
3.7V 1900mAh/7.03WH
For BEST SONNY LT999
3.7V 1800mAh/6.66WH
For BEST SONNY LT533
3.7V 2000mAh/7.4WH
For BEST SONNY LT989
For BEST SONNY LT988 LT966
3.8V 2000mAh/7.6WH