1430mAh Internal Replacement 3.7V Li-ion Battery For Apple Iphone 4S, 8GB 16GB 32GB 616-0579, 616-0580, 616-0581 Replacement Battery Dimensions: 8.1 x 3.1 x 0.4 (cm) Voltage: 3.7V Made of high quality and durable material Best replacement for the original battery with comparable standby and talk time Brand new 1430mAh High-Capacity Battery for iPhone 4s