Comments on: Battery Powered Battery Charger Is Probably Fake, Maybe Shouldn’t Be

By: Dave

Dave — Wed, 22 Apr 2009 23:34:29 +0000

You would never actually get all of the MAh out of the Ds and into the AAs. Large amounts would be dissipated by heat. Also, rechargable batteries need more wattage than that to charge efficiently. Ultimately, I suspect 4 D cells would be able to charge 2 AA cells about 1/2 times, but it could be used as a pocket warmer in the mean time.

By: rfl717

rfl717 — Thu, 16 Apr 2009 23:55:43 +0000

um… 10 sets of AA's actually – it would take up less space and would weigh less. That said, I agree Naivetek is probably a big hint.

By: mcman

mcman — Thu, 16 Apr 2009 13:00:30 +0000

Guess what? You can actually do this by taping D batteries together with any lower size.