1.Connect USB charger plugs into the back of a USB 5V interface,transparent charging slot alternating red flashing blue light.This has rightly said that the charger connected to a power supply.Blue-ray subsequently extinguished.
2.Put the rechargeable battery to the inside groove,there are red-ray in the transparent charging slot when it is going on charging.
3.When full of power,there are blue-ray in the transparent charging slot.