What is the deal with heat?
Heat is a dual edge sword with NiMH batteries. To get the most range/performance your battery temperature should be somewhere between 50-100 degrees with the best performance coming at the higher end of this range. Getting your NiMH batteries hotter than 120 degrees can cause damage. The other side of this is that charging your batteries when they are hot will reduce their lifespan. Ideally, you would ride with warm batteries and charge only cool batteries.
