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

To kind of answer my own question.....

After several runs on my 8 cell gp3300 battery its defiantly getting weaker. I mean it still takes almost 3300mah of charge its that its less punchy than my 7 cell gp3300 pack and about the same power as my 6 cell pack. I remeber the first couple of times using the 8 cell pack it was crazy fast.

I think the 170 - 180F+ temps hurt the 8 cell battery and eventually took its punch away. Anyway on the same gearing my 6 cell pack saw temps in the 120F's, 7 cell was in the 140-150F's. I think I am going to lower the pinion gear two teeth and try the 8 cell pack again.

Nimh batt temps were advised to 140F max and preferably below. I think it obvious, but the temps you're seeing is damaging your packs. The life expectancy will go way down.

Its always been said if they are too hot too hold, they are getting too hot! I'm suprised they haven't vented at those kinds of temps.