1) The lithium-ion batteries’ operating voltage is 3.7V, NiMH batteries only 1.2V which means lithium batteries stored more energy in the same volume. In other words, high-energy-density lithium-ion batteries can reduce the size of the battery itself and its related products.
2 ) Higher power density. high power density means that the same volume size battery can provide higher power.
3 ) Faster charging ability. the lithium-ion battery must be charged during stock before discharge, so the charging process is shorter. it is more convenient for end-user to use.
4 ) Up to 1000 cycle life.
5 ) lithium-ion batteries add a protection circuit, so the combination of the battery cells is more flexible.