... Mh battery cells connected in series.3.Pollution-freeLi-ion battery is 100% green energy,no any pollutant such as cadmium,lead,mercury,etc ... .Especially,the lithium iron phasphate battery exceeds 2000 cycles.6.No Memory EffectLi-ion battery is free from memory effect,a phenomenon ... ion technology is its flexibility, both in terms of battery application and cell design. Small in size and light in weight ...