Samsung Galaxy Ace S5830 GT-S5660 Galaxy Gio 1350mAh Li-ion Spare Backup Battery Length x Width x Thickness: 2" x 1.7" x 0.2" (5.2 x 4.3 x 0.5 cm) Compatible mode: Samsung Galaxy Ace S5830 GT-S5660 Galaxy Gio Battery Capacity: 1350 mAh Voltage: 3.7V Item Model Number: EB494358VU