24v to 12v charging, battery to battery charger, marine grade
Amazon.com: Car Battery Jump Starter - 1800 Amp 12V 24V Heavy Duty Jump Box, Works with Truck Tractor Excavator Automotive Engine Starter Battery Charger Booster Jumper Box with USB/DC Power Unit :
650nm 1mW~20mW Red laser module/ DC 12V~24V /Focus Adjustable
FreeEnergy 12V/24V DC Permanent Magnet Motor PMA for Wind Turbine Generator 350W | eBay
Batteries Part 1 - 12v, 24v and 36v | ilovefishing
775/795 DC Motor 12V-24V 3000-12000RPM High Torque – BULK-MAN 3D
NOCO GENIUSPRO25 25A 6V/12V/24V Professional Smart Battery Charger and Maintainer - Walmart.com