A high capacity and durable Li-ion battery always bring much convenience and fun to you. If you want to keep the power of your mobile phone working all the time you can take along with an extra battery for replacement. This 3.7V 1700mAh Li-ion Battery for Samsung M930/S5820/T589/T759 features high capacity stable performance and safe inner construction. Designed with overcharging protection system it can stop charging automatically when the power is full. Lightweight and portable this Li-ion battery is easy to take along with you. You can completely trust it.