... 4.Limited charging voltage: 4.2V 5.Warranty: 12 month Li-ion battery for mobile phones, cell phones 1. ... Item: Li-ion battery 2. Voltage: 3.7V ... 1, High energy density 2, High working voltage for single battery cells 3, Pollution-free 4, Long cycle ... price will be offered, welcome for long-term cooperation! Lithium Battery for Mobile Phone