about this item: Perfectly compatible for 18V Battery, Our battery adapter connector is well-made, snug fit your battery, can install and lock battery . Better security, our product upgrade has some security design. Equipped with 30Amp fuse protect battery devices from overpower damage. Waterproof fuse holder rubber cap fits on tightly to protect blade fuse inside. High quality silicone copper wire improves the conductivity and safety, heat-resistance 12 AWG wire is suitable for high-power applications. Easy to use, only need to move the power adapter into the groove, then push converter and make it has locked the battery. If you want to remove the adaptor from the battery, please press down the buckle of the battery, then remove it. Adapter made of durable ABS, heat resistant and not easy to corrode, perfect for indoor and outdoor use. Widely used, power wheels battery adapter has 12 gauge wire installed, Maximum permissible current 20A, provides enough power upgrade your power tools, on toys, work lights or robotics DIY. (Note: battery not included) Important Tips: This converter is not a charger, it only outputs the voltage and power directly from your battery. The red wire is connected to the positive terminal, black wire is connected to the negative terminal. When using, make that the positive and negative wires of the device correspond to the positive and negative wires of the adapter. If not used for a long time, please be to remove the battery form the adapter. Caution: This product is only used as an output, not as an input to charge the battery, remember, remember, remember Material: ABS colour: green Package Contents: 2 x battery adapters 2 x terminal blocks 6 x fuses Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.