You can use 5 14.4V-22Ah lithium batteries (need to be used in random series) for 300 each, 5 for only 1500 yuan, plus a 5A charger (more than 100 yuan)
http: //detail.1688.com/offer/40471859892.html?spm=a2615.2177701.5683209.4.nCUapI
You can use 5 14.4V-22Ah lithium batteries (need to be used in random series) for 300 each, 5 for only 1500 yuan, plus a 5A charger (more than 100 yuan)
http: //detail.1688.com/offer/40471859892.html?spm=a2615.2177701.5683209.4.nCUapI