... voltage: 4.2V 5.Warranty: 12 month Li-ion battery for mobile phones, cell phones 1. Item: Li-ion battery 2 ... offer over-discharging, over current and short circultprotection, more safeguard for using. 7. Gilded and flexible connecter, better conductive propertly 8. Satety ... friendly Advantages: 1, High energy density 2, High working voltage for single battery cells 3, Pollution-free 4, Long cycle life ...