... energy,no any pollutant such as cadmium,lead,mercury,etc.4.Non-metal LithiumLi-ion battery ... cycle life, some 8 times more than Lead Acid.5.Environmentally Friendly Non-toxic, non-contaminating ... and does not exhibit the 'memory effect' of Nickel-Cadmium and Nickel-metal Hydride solutions.6 ... in size and light in weight 1/3 weight of Lead Acid .Competitive AdvantagesWell and High Quality Control , Prompt ...