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I have 8 Energizer batteries to power a 12v light..?
The light is neon and is 12v so I used 8 Energizer batteries with 1.5v each (altogether 12v) to turn the light on. The question is, how long will the light stay on if turned on.
I forgot to say it is AA
It has the current of 3 Amps (says Am3)
Energizer is a brand name, not a battery type or size.
1.5 volt cells come in all different sizes, from AAA to E, so tell us the size.
The other unknown is the current used by the light. Without that info, you can't go any further.
edit: I'm curious as to why you though the problem could be solved with only part of the data?
So it is 8 - AA alkaline cells and the load is 3 amps. A typical AA cell has a capacity of 2 amp-hours, so that means you will discharge the cells in 2/3 of an hour. But that is a very high current for an AA cell, so I think the voltage will be reduced to perhaps 1.0 volts each, or lower.
Use D cells or two 6 volt lantern batteries. You would get about 3-4 hours out of either of these alternatives.
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