Which is better, NiMH or NiCD?
A. The power-to-weight ratio of NiMH is better than that of NiCD. Additionally, NiMH cells are available with greater capacity (maH). NiMH are also better for the environment whereas NiCDs have the toxic heavy metal Cadmium and MUST be recycled. The benefit of NiCDs is that they are often cheaper than NiMH and some are capable of higher current draw than their NiMH counterparts. This is why NiCDs are often used in cordless power tools. Lastly, NiMH cells are more affected by high temperatures and will degrade more quickly if they get hot. If your vehicle draws a LOT of power and causes your packs to get hot, NiCDs may be a better choice.
