2&times; New B600BC Battery & Universal Charger For Samsung Galaxy S4 SIV i9500 i9505 i337 i545 R970 L720 High-quality and rechargeable lithium-ion cell, long conversation and standby time long working life and excellent security. Integrated microchip prevents overcharging & lengthens battery life. Capacity : 2600mAh (Charger) Charging indicator: Red LED, Full of the indicator: Blue LED (Charger) Automatic shutoff when battery is completed charged