Compatible with Makita 18V Lithium-ion Batteries. Compatibility: This battery is a Li-ion battery adapter that only works for Makita 18V Li-ion batteries, replacement battery for Makita BL1830 BL1840 BL1850 BL1860 BL1840B BL1850B BL1860B BL1820 batteries. The adapter has a 15-inch 14-gauge wire installed. Easy to install: The battery adapter has four screw holes for easy fixing with screws, this allows it to be easily mounted on the power wheel. (Note: The wires are coded black for negative and red for positive. )And this fixed structure is really strong. Suitable for high power applications. Versatility: Our electric wheel adapters come with 14 gauge wire and can be used in many high power applications to keep you and your kids entertained. Designed as a converter to power your kids' electric wheels or DIY creations. Easy to install, locks onto your battery very well. High quality : The battery adapter is made of high quality ABS plastic, the battery adapter is durable and lightweight. It has excellent scratch and impact resistance and chemical resistance, and is impervious to heat, moisture and corrosion, making it ideal for indoor and outdoor use.