Feature: *Better security: The adapter is equipped with a fuse and high-quality cable to prevent excessive transient current from damaging the battery and equipment. *This battery adapter/cover has been tested to work with Milwaukee 18V Li-ion batteries. *Model of compatible battery: Suit for Milwaukee battery 18V series. *Made of high quality material,durable and safety to use. *Adapter has 14 gauge wire installed,ready for high power applications. *Easy to install ,locks on you battery very well. *Portable design,convenient to carry and easy to use. 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. Package includes: 1 x Battery Adapter (no battery) Note:  Light shooting 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.