... use Power Bank for Samsung Galaxy s3 with Dual USB Slot MX-8000 DUAL LED LIGHT,Multi circuit protection,use chipset,IC ... 5V 0.5~1.2A 4-8 hours* Other Funtion: DUAL LED light* Batter Indicator: 4 Bits 100%,75%, 50% ... button ON/OFF the LED LIGHT Features: 1. DUAL USB output and DUAL LED light design.2. Can quickly meet charging ... electrical appliances Power Bank for Samsung Galaxy s3 with Dual USB Slot