Battery Charger Adapter for Samsung Admire R720
This package is specifically designed for Samsung Admire, Model SCH-R720 from  MetroPCS / Alltel as we stated in our listing.Not Compatible With the new Samsung Admire 4G, Model R820 from MetroPCS .If you have the new Samsung Admire 4G, Model R820, this charger is not for you.AC/USB Desktop Battery Charger :* Quick charge with automatic constant current control prevents battery from over charging, short circuit, and electronic shock.* Charge your cell phone battery without the phone.* Also work with OEM (original) battery.* LED charging light indicator. Turn red in charging, turn blue when done.* Input: AC 100-240V 50/60Hz 150mAh.* Output: DC 4.2V 350mAh  50mA.* USB Port Output: 5.2V 800mAh.* Use this charger to charge the stock battery as well, swap one out when the other dies.