It's a known fact that phone batteries lose their ability to keep a charge after a while. It can be inconvenient to always have a dead battery. This is a great oversized battery with a custom sized back plate for you Samsung i9100. This larger size battery has a capacity of 3500mAh at 3.7V. It performs great and adds some extra power giving extra usage time. What could be better?<br />?- Voltage: 3.7V<br />- Capacity: 3500mAh<br />- Replaces your old damaged battery<br />- Back case material: hard plastic<br />- Designed for Samsung i9100 Galaxy S2<br /><br />  <br />It's a known fact that phone batteries lose their ability to keep a charge after a while. It can be inconvenient to always have a dead battery. This is a great oversized battery with a custom sized back plate for you Samsung i9100. This larger size battery has a capacity of 3500mAh at 3.7V. It performs great and adds some extra power giving extra usage time. What could be better?<br />?- Voltage: 3.7V<br />- Capacity: 3500mAh<br />- Replaces your old damaged battery<br />- Back case material: hard plastic<br />- Designed for Samsung i9100 Galaxy S2<br /><br />                                                                                                                                Dimensions: 2.36 in x 1.81 in x 0.39 in (6.0 cm x 4.6 cm x 1.0 cm)<br />Weight: 2.47 oz (70 g)<br /><br />