Hey all!

I am working on a rebuild of my TLT- more for crawling than charging about. My question is whether today's 2500 AA NiMH batteries (or something like those) can put out enough amperage to run a 540 motor. I guess I might run as low as a 19 turn. Just trying to save space and weight.

nothing compares to sub c size cells. they may have the mah rating but the capacity, and voltage release is lower..

imho the amp draw will cook the AA's in pretty short order ... on the other hand, it wouldn't cost much to try out a set of alkaline AA's just to see if they get "egg-frying" hot after a run; while the alkaline's won't have the same mah capacity, the amp draw/discharge profile should be similar. Caveat: I'm no EE, this is just my 2 cents. I'd test the idea on some disposables before risking good 2500 AAs.

:cool:

Some of todays 2/3 As "might" hold up for awhile but I don't think AAs would. We run AAs in our BRP cars that use slot car motors and the batteries are warm after a run so I can imagine what a 19t motor would make them feel like. The drawback to 2/3 A cells is the lower MAH rating. AAs aren't really designed for high amp draw situations. If anything would survive for long it would probably be some of GPs 22-2300 cells that are now available. If you ask me AA alkalines would definitly cook because of their design to slow discharge. Try a cheap set of AA NiMH cells from Cheap Batteries or Batteryspace and see what happens I guess. :)

I suspect that NiMH batts will discharge faster than alkalines- as in handle the current better. I just hope somebody who actually knows will speak up! :lol:

I know for sure that I wouldnt' want to use low budge batts for this. I did see an incredible deal on 2500 AA's at BatterySpace.com but I have heard horrible things about leakage. I was thinking of those for radios and bike lights...

I have some of their 2000s and 2250s that work pretty well for the before mentioned BRP racing we do. I've never tried a high amp discharge on them but I have a feeling they wouldn't like it. :)

Well, I figured that would be the response. Worth a thought though. Thanks all!

you might want to consider lipoly batteries also.

Chris,

Take a look at these batts. they might be a vaible small space solution.

GP 4/5SC 2200. Hot new cell. 40 amp cell.

linkage: http://www.unipros.com/cbpsite/loosecells.asp?session_id=214290

-Tone

Chris, I know from experience that although AA's will give you a much longer run, they lack performance. There is no punch in AA's.

I have a mini t - which I know is different - but I tried running AA rechargable 2200's (actually they were in my digital camera) and they wouldn't give me near the punch or speed that a high voltage pack will.