I use a powerport 12 which runs off either a lighter plug or a wall wart.

It can charge two 4 packs of AA or AAA plus four AAA thru C (maybe D) for a
total of 12 batteries at a time.

do I need this? Heck YES. we use for our model rocket club the following....

cobra FRS radios (5 of them with 3 AA bateries)
my film camera just recieved a high speed autowinder (4 AA) and I have two
flashes for it (2 AA + 2 AA)
portable radio scanner for tracking rocket locators and monitoring aircraft
to avoid (4AA)
last year we built a RC lander/rover unit with 2 recievers (4 AA + 4 AA) and
two transmitters (8 AA +8 AA)

and I know I am missing *something* but that still come to over 50 AA
bateries. admittedly I do not have 50 AA batteries, as we usually grab
batteries from one thing to run another, but I am trying to get that
eliminated, thank goodness for ebay.....

I wont even get into the setup we have for launch controllers, as that is a
12 volt setup and we are building gear for that voltage standard as well
(camcorders, launch controllers, PA, FRS base radio, etc.)

-- 
Tater
President of MARS Club (NAR #660)
www.mars-rocketry.com
KC9ESF
NAR #79654 L1
EAA #703312
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"Rtavi" <rtavi@eudoramail.com> wrote in message
news:IaidnRouOamcOdXfRVn-2Q@comcast.com...
> We travel for 2 months each summer and often dry camp with no electrical
> hookups.  I need a good charger that will work on my trucks 12v cigarette
> plug .  So I can charge up the AA Nickel metal hydride batteries that I
use
> in my Sony dsc-W! cybershot.  Do you have any recommendations or models to
> avoid?  Thanks.
>
>