4S bms /protection board balance 12V21V sodium ion battery protection board 10-100A startup power supply SMBUS/UART/I2C/RS485

4S bms /protection board balance 12V21V sodium ion battery protection board 10-100A startup power supply SMBUS/UART/I2C/RS485
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sku: 1005007202194097
$17.87
Shipping from: China
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