QCell AT&T 2x Motorola Photon 4G 1750mAh MB855 (HF5X) Slim Battery + FREE Universal Charger 1800mAh Razor Slim Battery for Photon 4G! Designed in Canada! Slim Profile Design with Maximum Cell Efficiency! FREE Universal Charger Included! DYNAStop overcharge IC stopper built in! Voltage: 3.7V / Premium Quality and Best Material used!