While we are talking Lip batteries, I found this site today: http://www.rclipos.com/ . They have big-brand packs at far lower prices than the RMP, Tower Hobbies etc, I worked out that the pack I wanted was almost $100 USD cheaper, plus another $30 saved on shipping. I don't know how reliable they are, but at those prices, I might have to try them out.

@ Cell damage. Don't forget that their cases have reversed polarity to normal cells! That is, the nipple is negative, and case is positive.
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YEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH

lol you just saved my ass big time then lol
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Tim Team Reaper.

It's happened to so many people dude.

@nick, those prices are good, but some of the platinum hobbycity ones are still better... what packs are you eyeing? If they're polyquest, i can give you the price I see on hobbycity.
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hahaha thankfully 99% of everything designed to work with a123 is reverse protected. what made them make the cells that way is mind boggling..
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

@ Angus: I would probably go for the Poly RC PQ-5000XQ-6S Li-Poly Battery. Its not listed at Hobbycity for some reason

anymoretips on a123s like how to solder and what part of the battery can short on what lol

i welded the end off my $40 hardened steel sidchrome pliers from some how shorting a dewalt pack for 0.05 of a second when cutting the wires off i think i touched the nose on something when i cut threw the ground wire?
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Tim Team Reaper.

http://www.terrorhurtz.com/a123/build.aspx

just be careful cause the cells are opposite polarity to the normal nicads. they solder pretty easy just have lots of heat (80w plus iron)
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

http://www.skyhobbies.com.sg/HYPERION/A123packassy.pdf
As i have not aculy used a123's i dont know how good it is but looking though that it shoulds alright.

Im having troublesoldering a123 cells myn have the little steel discs on them that i have ground so solder should stick but when i put a blob of solder on it just beads then when its dry i can pick it off easy with my nail.
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Tim Team Reaper.

YAY i can solder the cells all fixed just needed hotter iron.

Next thing how do you wire up the balancer wires and dose it depend on the balancer?
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Tim Team Reaper.

AAARGGHH

Damn cells slightest bump the solder cracks off.
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Tim Team Reaper.

Try putting a grinding bit (one of the little pink stone balls) in a dremel and scuffing up the end of the cell. They should solder fine then.

and yes, Balancer wiring does matter, and is balancer-dependant
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done that with dremal before hand.

using 80w soldering iron flat tip and silver solder and solder joints just pop off.

As for balancer wires will be getting this charger.http://www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=7523
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Tim Team Reaper.

Dremeling them worked for me with a 60w Weller
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Great minds discuss ideas. Average minds discuss events. Small minds discuss people