The Anker 2 x Replacement Batteries for Samsung Galaxy S5 comes in a 2 pack along with a battery charger for convenient usage and extra long battery life. Each batter is 2800mAh and 3.85V. They come as zero cycle batteries that use premium Grade A cells and can last for more than 500 charge cycles and ensure a longer life. It features built-in overload and over-voltage protection, and is even certified by CE, FCC and RoHS. It also comes with an 18-month warranty.