As you know thousands Li-ions in the market. they all looking like same.but if you look the spec. you can see big difference most is 2200mAH but our is 3350mAH( about 1/3 more) recharging time 3000 times ( most other brand is 1500. and charging time only half times. all our batteries is mew. ( each junk electrical car have 7700 piece 18650) PowerSource is a machine designer and manufacturer can sell you one or supply you millions a months. we also carry 100's device using our batteries
