Anker Cell Phone Standard Li-ion Battery Battery type: Li-ion; Voltage: 3.7V; Capacity: 1800mAh Uses selected Top 10% Grade A cells to ensure longer battery life and charge cycles; More than 500 recharge cycles over the life of the battery. Built-in overload & over-voltage protection; Tested under strict quality control standards; Certified by CE/FCC/RoHS Compatible with various devices: Samsung Galaxy S I9000, GT-I9000; Samsung Captivate; Samsung Epic 4G; Samsung Focus; Samsung Vibrant Fits EB575152VA...(full list below) 24 x 7 email support, 8-hr x 5-weekday call support, 18-month hassle-free warranty, Shipping same or next business day