Hi Zee,

NiMH must(!) be used warm from the charger; running them cold, or worse, the next day will cause damage. Due to the high self discharge rate of the high capacity NiMH, the cells will have drifted apart during the night, causing some cells to be depleted before their neighbours, the depleted cells will suffer.

When I have a race the next day, I charge my packs the day before and hook them onto the charger the next day half an hour prior to running them, charging with 2-3A, until the cells are warm again.

The high capacity NiMH are high maintenance cells, treat them properly, or buy yourself replacements all the time...

I switched to Lipo's last year and never gave NiMH a second thought.

Regards, Jan.