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6-12V NiMh batteries

Hi guys,

I need a NiMh battery to power a 15W lamp. What would be a good 6.0, 7.2, or 12V power source? I need about 4.5 amp hour (at 6.0V). What is the best value for the dollar? Which is best laptop, rc, cell phone, camcorder, C cells, etc?

Any input would be greatly appreciated

Thanks

Reply to
John
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Have you looked at electric model car/truck/aircraft batteries, you can get them in most voltages 6 cell 7.2v being most common. 2 packs of 3000mah would suit well.

7.2,
Reply to
Seamus O'Donnell

Then once you've chosen the most suitable pack... copy it and buy the charger. Buy the seperate tagged cells for half the price at somewhere like RS, Farnell, CPC (UK, anyway).

Ben

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I'm not just a number.  To many, I'm known as a string...
Reply to
Ben Pope

If you're looking for best value for the dollar, why have you narrowed your choice to NiMH? They're an excellent choice for long-term cycling and light weight, but they aren't so good in terms of capacity per dollar. Sealed Lead-acid is still the winner there (although you're certainly at the smaller end of the lead-acid scheme.)

Tim.

Reply to
Tim Shoppa

AA NiMh batteries are cheap on eBay- $1 apiece or less for high capacity

2,000 mAh batteries. In your situation you'd need about 15 batteries, but this may still be your least expensive method.

PS- NiMh AA batteries are 1.2 volts per cell, so you'd need 5 batteries in series to get to 6v. You'd need three sets of five batteries to get to 4.5 amp-hours.

7.2,
Reply to
Chuck

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