This is a genuine internal battery replacement for Sony Xperia L1 L1 X F5121 F5122. The battery is compatible with these specific models and is of OEM quality. It has a capacity of 2620mAh and operates at a voltage of 3.8V. The battery comes in a sleek silver gloss finish and is designed to be wired, connecting via the phone's antenna port. This product is ideal for those looking to replace their battery with a high-quality, reliable option that is specifically designed for Sony Xperia devices.