What is the max safe temperature for a nimh battery???

Originally Posted by Duster_360

Here's some guidelines -

http://www.rc-monster.com/forum/showthread.php?t=2200

Besides the obvious - you have the body vented I hope, run a fan of some kind. I run a novak setup on esc and a pr of integy fans on the motor heatsinks.

I run 7 cell paks in my "stock" Emaxx, and only the motors get hot - 7 cell Maxamps 4400s. I'm still running brushed motors in it and they get 160-170F. I have to let it cool down between pacs. Batts are warm - a little cooler that when they come off charger. I asked when I got my 4400s if they needed breakin - Jason said no. Yours may be diff, you might want to run them easy for a few cycles. I've always heard temps like 160F is damaging the cells - that damage appears as shorter batt life.

Thanks for the link - that's exactly what I am looking for. Guess my "stock" E-Maxx isn't going to be stock much longer. I need to get a fan or two me thinks... Will adding fans actually draw more current and therefore make the battery temp issue worse though?

I think I will also contact the battery manufacturer, that's a good idea. And I was already thinking I would have to let it cool between runs, so I guess it's a good thing I also have my Revo! It's nitro, so I don't have to worry about recharging it. I'm having a lot of fun with the E-Maxx though, especially for a truck right out of the box.

Someday (in the distant future I am afraid), I'd like to build one (a Revo or E-Maxx) from scratch and do the whole brushless/lipo thing. I don't have the time or moeny to do it now though. Any idea if lipos work in an E-Maxx without replacing motor and ESC?