Onite Wall Quick Charger for Samsung Galaxy S4 S IV i9500, Battery Dock Charger & USB port
Compatible Models:Samsung Galaxy S4 i9500 , S3 i9300Full charge time:For Onite 2600mAh battery: 4.3hoursFor Onite 5200mAh extended: 8.7hoursFor Onite 7800mAh extended: 13hoursCompatible with:Samsung Galaxy S4 / S IV GT-i9500Android Cell Phone (All Carrier Version, AT&T;, T-Mobile, Sprint, Verizon, Global Unlocked)Charger Instructions :Positive and negative of the charger are automatically recognizableFirst, please take a look at your battery; there are one mark "+" positive contact and one mark "-" negative contactThen, take a look on the Onite charger; you can get two little movable prongs. As the positive and negative are automatically recognized by this charger, it doesn't matter which is contact on positive and which is negative;Third, Pull down the bottom, and put battery in it. Adjust the charger prongs to match the polarities of the contacts on the battery. Release the part of the charger that moves. This will lock the battery in place. When the light on the charger turn on to blue, it means they are prepared to be charged;Finally, plug the charger into the wall, the light becomes red, which indicates the battery charging. When the light turns to blue again, that indicates the battery is fully charged.