... 1.5 hoursPower Supply: 2 x AA Alkaline dry batteries or rechargeable Ni-MH batteries, 3V exclusive chargerPower Input: 3V DCAdapter Ring Include ... use with semi-used batteriesDo not dismantle or drain batteries or put batteries in water or fire, which may cause explosion, ... of lensDue to its high power consumption, we strongly recommend rechargeable batteries. If common 1.5V battery is used, the flash ...