This is a genuine factory-spec battery – the same as the one that came with your phone. It has the same capacity, and lifespan as the original. This means whether you're looking to replace an old battery or simply want a spare, you can be confident of getting the same high-quality experience as the original.

Specification:

• Battery: 3.7v Li-Polymer
• Capacity: 3.7v 1650mAh

Compatibility:

• Galaxy S2 / Galaxy S II GT-i9100 / Galaxy S2 4G Smartphone