Nimh heating on charge

[Fast Eddie]

My nimh batts are getting quite hot when charging, is this normal?

[ianhaye]

yes they do get quite warm, depends on how you are discribing "quite hot" if you mean as in to hot to hold then have a problem with the pack

[Fast Eddie]

can hold but are quite warm, just some i bought from the bay as dont have the budget for lpos, thanks for the help mate

[westie]

what cells are they? what you charging at? i always charge nimhs at 1c i.e 4600 mah 4.6amps

luke

[Fast Eddie]

the pack thats gets really hot are intellect SC-4200, the charger is an ansmann that fast charges at 3000mah. To be honest they could be screwed as that can happen when buying someones second hand batts

[bodgit]

See this post http://www.oople.com/forums/showthread.php?t=6362
They can go up to 42 deg
6. Use a temperature cut-out as an additional safety feature set at 42 deg. C max., located on the hottest cell (usually middle cell). If charging on a cold day then consider reducing this to around 35 deg. C.

[Fast Eddie]

thanks, makes interesting reading