Universal battery External Charger for Samsung Galaxy Light Package includes:   1 x Universal USB/AC Charger * This universal desktop battery charger will charge virtually any   smartphone Li-on batteries in the market.    Samsung Galaxy Light T399( T-Mobile ) Compatible with  Samsung Galaxy Light T399N( MetroPCS ) Universal Battery Desktop Charger Quantity: 1     Instructions: * This is an universal charger , which can charge virtually all smartphone li-on batteries in the   market. * The top panel could be slided and the metal contact pins are also moveable. * You can slide it back and forth to fit virtually any size of Li-On batteries in the market. * You only need 2 pins to charge a battery. * To Charge battery for Samsung Galaxy   Light allow the 2 metal pins on the charger   to touch the 1st and the 3rd contacts of battery. * For other batteries, it's not necessarily to be the 1st and 3rd though, please refer to the   user manual. * You should see the LED light turn blue   on the charger, that means the contacts           LED charging indicator   has been firmly connected. * Now you could plug in the charger with the battery into a power socket. * The LED Light will turn Red when charging the battery, turn blue to indicate the   battery is fully charged.   Features: * Complete charging solution for cellphone batteries * Worldwide traveler charger, accept input voltage: AC100V~240V. * High quality battery charger is a handy companion for your cellphone * Charger is designed with a foldable A/Cplug that charges your cellphone battery   anywhere in the world. * Charge your cell phone battery without the phone. * Also work with OEM (original) battery.   * Input: AC 100-240V 50/60Hz 150mAh. * Output: DC 4.35V 600mAh ± 50mA. * USB Port Output: 5.2V 1000mAh. * Use this charger to charge the stock battery as well, swap one out when   the other dies .