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Amazon.com: BLUETTI D40 DC-DC Battery Charger for RV Batteries, 12V/400W Output RV Battery Charger for Charging LiFePO₄, AGM/Gel, Lead-acid, and ,

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BLUETTI D40 DC-DC Battery Charger for RV Batteries, 12V/400W Output RV Battery Charger for Charging LiFePO₄, AGM/Gel, Lead-acid, and Calcium Batteries : Automotive - Amazon.com