1) The lithium ion batteries’ operating voltage is 3.7V, NiMH batteries only 1.2V which means lithium battery stored more energy in 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 a 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 battery add protection circuit , so the combination of battery cell is more flexible.