My $100 universal fast charger for 12v 24V 36V 48V 60V 72V at max 10Amps

converter: HJS-480-0-48 for lithium-ion set-up * charging voltage 12V*12.6V 24V*29.4V 36V*42V 48V*54.6V 60V*67.2V 72V*84V converter link: https://shopee.ph/product/44367494/2662403295?smtt=0.0.9