You dismissed the part where the energy density/capacity/current draw is way better of Li-Ion compared to NiCd or even NiMh. Needless to say that cadmium is tox

You dismissed the part where the energy density/capacity/current draw is way better of Li-Ion compared to NiCd or even NiMh. Needless to say that cadmium is toxic and the use of NiCd battery is heavily restricted in the EU.