All electronics ship with US style plugs.You may need a voltage converter or a plug adapter.
Special Features
14500 Rechargeable Battery Size: 14*14*50mm
3.7volt Li-ion Batteries Application: Flashlights, cameras, keyboards, etc. It depends on your device.
Note: 14500 Battery has a Button Top
Content: 8 Batteries
3.7V lithium battery is a nominal voltage of 3.7V, full voltage of 4.2V lithium batteries, if you test found that the voltage in the 3.7-4.2V to float are normal phenomenon