ORIGINAL: -pkh-
I used to charge my NiMH packs at 1C, but found they got pretty hot when they peaked out, and their service life was shortened. Now I charge at about 0.25C or less.
They shouldn't do this if they are OK.
The ICE ( and Triton for that matter ) feature a temperature probe.
Often it goes unused, but the probe is an important part of the historical data graph info on the ICE.
You use it to check to see if the battery is able to be charged and discharged to it's rated capacity w/o any undue heat build up.
The probe is used to also provide a safety cutoff during all charging operations.
I leave mine at the default of about 90 degrees F. for NiCD, NiMH packs and slightly higher for LiPos.