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Need to pick a good 12v rechargeable battery for led camera lights? Answered

I made some video camera lights out of 3 1w MR16 leds. Right now I have a sealed lead acid that works well but is 10 pounds. I need a alternative that will be more mobile and practical. I have considered taping into my cameras phantom power which provides 48v for a mic. 

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I doubt you'll get 3W from the 48V supply.
(Rechargeable AA's may be your best bet)

L

You could put 8 C alkaline cells in series an you could stuff that in a back pocket or 10 C rechargeable cells.

What kind of battery life are you after ? Steve

What about a battery from a cordless drill?