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480w 500w 1000w Adjustable Switching Power Supply Digital display 5V 12v 24v 30V 48v AC -DC Converter 80v 120v 220V LED Power. Charge your batteries and battery packs. Use to wake up batteries with sleeping BMSs. This listing links to a 3rd party affiliate.
See video on how Jehu wakes up BMSs with this power supply: