DUAL BATTERY SLOT & DUAL VOLTAGE DESIGNSupports for two Milwaukee M18 18V batteries for parallel 18V or series 36V adjustable output via built in toggle switch to match different DIY power demand and extend working runtime of your equipment. ^^ PREMIUM 14AWG 20CM WIRE WITH SAFETY FUSEEquipped with thick 14AWG copper wire and built in overcurrent protection fuse rated up to 30A to avoid short circuit damage stable power delivery for high load RC and robotics builds ^^ WIDE DIY APPLICATION SCENARIOSPerfect for upgrading kids Power Wheels ride on car RC truck RC car custom robotics work lights off grid small power supply and various homemade electronic DIY projects battery not included ^^ SECURE LOCK FIT & EASY INSTALLATIONPrecise buckle design locks tightly for Milwaukee M18 battery packs including 48-11-1850 48-11-1862 no modification or soldering required plug and play for quick setup ^^ RELIABLE ABS SHELL & AFTER SALES SERVICEDurable high impact ABS housing against wear and drop we provide 1 year quality replacement service to solve your after purchase troubles efficiently