Makita 18V Battery Power Wheel Adapter With Fuse And Switch. Better security: The adapter(1pcs included) is equipped with a fuse and high-quality silicone copper wire to prevent excessive transient current from damaging the battery and equipment. You can use it safely Perfectly compatible : work with for Makita BL1860 BL1850 BL1840 BL1830 BL1860B BL1850B Li-ion batteries. Easy to install ,locks on you battery very well. Easy to DIY operate:The adapter is equipped with a switch to control the current of the battery on or off. At the same time, it is equipped with wiring terminals, which is convenient for you to connect the power cord of the device with the power cord of the adapter faster and better. Multi-scene use: Power wheels adapter has 12.5 inches of 14 gauge wire installed; You can use it to upgrade your power wheels, Rc toys, Robotics DIY etc. Maximum permissible current 20A. This adapter will surely allow you to quickly and safely upgrade your power wheel and enjoy the beauty of DIY. Tips: The red wire is connected to the positive terminal, and the black wire is connected to the negative terminal.When using, make sure that the positive and negative wires of the device correspond to the positive and negative wires of the adapter.If you don?t use it for a long time, please be sure to remove the battery form the adapter