Detailed Product Description Li-ion battery pack 4400mAhFeature:1)High quality and operating voltage 7.4V Li-ion rechargeable battery pack.2)Made of 4,2200mAh 18650 cells pack with PCB and poly switch for full protection.3)2P2S(2pcs connected in parallel 2pcs in series)4)Light weight,higher energy density,small volume.5)Longer service life,1C for Circulation using 400 charge/discharge Cycle, ...