BMS 3S 4S 5S 6S 7S 20A 12.6V lithium battery protection board 16.8V 21V balanced 25.2V 29.4V 18650 protection board heat sink

BMS 3S 4S 5S 6S 7S 20A 12.6V lithium battery protection board 16.8V 21V balanced 25.2V 29.4V 18650 protection board heat sink
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sku: 4000246058799
$3.75
Shipping from: China
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