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DPChallenge Forums >> General Discussion >> Assault on Batteries!
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 03/17/2008 04:01:27 PM · #1
Batteries are a horrible thing to throw away. They are overpriced. I highly advocate using rechargables whenever needed. They are for the most part even better than disposables and can be reused. I would never debate that disposables are better - especially since rechargables now come fully charged:
for example - eneloop

Anyway, this was enlightening to me and I was reminded "the world isn't always as it seems!!!!

------> 6 volt = 32 AAs?

Note: please read people's comments, not 100% of 6v batteries are made of AA's -some have other types inside.
 03/17/2008 04:05:19 PM · #2
snopes
 03/17/2008 04:08:39 PM · #3
I was actually going to start a thread asking about decent chargers. I've bought the tiny chargers that come with Energizer batteries, but they are sort of a joke. I then bought the bigger charger (about the size of a VHS tape only deeper) that can charge 8 batteries at a time and has a little meter on how charged the battery is, but I find this usually doesn't charge one or two of the batteries and it always seems to be russian roulette on if you are actually going to get four batteries ready for the flash.

Any good alternatives out there?
 03/17/2008 04:12:28 PM · #4
I think the trickle chargers work better. The kind you describe as being about the size of a video tape. I have one that I bought a few years ago when rechargeable alkalines were still on the market and Nimh's were starting to appear. Handles both types and Works nicely. It takes about 12 hours to charge a set, but if I am using name brand batteries, they seem to last well.
 03/17/2008 05:04:37 PM · #5
Originally posted by DrAchoo:
I then bought the bigger charger (about the size of a VHS tape only deeper) that can charge 8 batteries at a time and has a little meter on how charged the battery is, but I find this usually doesn't charge one or two of the batteries and it always seems to be russian roulette on if you are actually going to get four batteries ready for the flash.


I hope this one isn't the one you have... I've been planning to buy this one.
 03/17/2008 05:07:42 PM · #6
Originally posted by metatate:
for example - eneloop


I worry whether 2000mAh is enough. I know one of the reviewers said it was ... but he basically disqualifies himself by stating that his 2700mAh's didn't last 1/4 as long and that is seriously doubtful. I mean, who knows *what* he was really using or how old or how well cared for his batteries were.

I have no problems with the 2700's that I use. They last a LONG time for me in my Canon flashes.

Message edited by author 2008-03-17 17:08:01.
 03/17/2008 05:33:13 PM · #7
I had a friend try this and he said there were 30 AA batteries inside. However, the newer batteries might be different. I wish they were filled with rechargeable batteries and the casing was a charger ;P

Originally posted by BeeCee:
snopes
03/17/2008 05:47:49 PM · #8
Originally posted by metatate:
I had a friend try this and he said there were 30 AA batteries inside. However, the newer batteries might be different. I wish they were filled with rechargeable batteries and the casing was a charger ;P


The math just doesn't work on that. 30 x 1.5 volts (standard AA alkaline battery) = 45 volts -- or to get 6 volts, you'd end up with a much higher amperage than would be needed in a typical lantern battery.

~Terry
 03/17/2008 06:09:54 PM · #9
For the math part, 32 AA's would work. Each one is 1.5 volts, so 4 would be needed to equal 6 volts (hooked together in series). Then, each bundle of 4 batteries would be wired together in parallel. Come to think of it, they probably COULD get away with using 30 AA's, since they are used almost exclusively for lanterns these days. 6 'strings' of 5 AA's @ 7.5 volts would give off a brighter light; the lamp would just burn out a little sooner.

Remember, the standard 6V lantern batteries have been around for a LOT of years, well before the era of today's personal electronics boom. Back then, it was just cheaper to re-package the AA's into another case, rather than design a completely new product. Since someone (finally) caught-on to the manufacturer's methods, the batteries have (finally) been redesigned.

Also, amperage usage is device dependent, not source dependent... its the voltage that must match. Just like in a house: your computer is plugged into a circuit that will supply up to 15 amps (before the breaker trips), but only uses ~2-5 amps. It doesn't harm the computer to have the extra amperage available, but the voltages of the source and device must closely match.

btw - I'm interested in the MaHa batteries / chargers too, if anyone cares to share their story.

Message edited by author 2008-03-17 18:25:25.
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