Originally posted by akrcracer
Caution... I had one of the promatch brand. It's a little inaccurate by 20 degrees. I now use a Raytek gun... But if you buy one, I would charge batteries past 120 degrees.
the only one that is really accurate is the exergen, but then again they're alot more. i, also use a raytec. after calibrating w/ a friend's exergen, i determined mine to read about 8 degrees F hotter than actual. not really a big deal as long as i take it into account. now, i use it mainly for tuning my nitros (just as a guide, not as law - but that's whole another discussion) but i have temped my batteries, and i agree going beyond 120 might be detrimental. you have to remember it'll only read ambient temp, not what's at the core. so, you can figure it'll be warmer.