LiPo is a whole other can of worms.
NiCd has the bonus of taking the colder weather better than the NiMh but as Styrak said, NiCd has the memory effect. Basically put, discharge the NiCd entirely before you recharge it or you will fuck the cells.
Age Verifier - Lower Vancouver Island
Brotherhood of Nod - Nod Prime || Vancouver Island Airsoft League - President