4 series 14.8V18650 lithium battery equalization plate 4S16.8V polymer battery equalization boardProduct size: 26*20.5*2.4mm Solder point description: B4 battery positive electrode B3 connection between battery 1 and battery 2 B2 connection between battery 2 and battery 3 B1 connection between battery 3 and battery 4 The negative electrode of the B battery pack; Connection display:
