ITEM NAME:3S 25A 12V 11.1V 12.6V Balance 18650 Li-ion Lithium Battery PCB Board j5l 3S 25A 12V 11.1V 12.6V Balance 18650 Li-ion Lithium Battery PCB Board j5l a.imagelink a:hover.imagelink {color:#000000;.The internal resistance of 3 battery capacity are closer will be better. The capacity of the battery internal resistance is closer will be better. Short circuit protection: Yes, delayed self recovery.