4S 4.2V Li-ion lithium Battery balance board balncing full charge Circuit 16.8V
1,13 €
B3 +: connect with junction between battery 1 and battery 2. B2 +: connect with junction between battery 2 and battery 3. B1 +: connect with junction between battery 3 and battery 4. B4 +: connect with a positive battery.
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