ZWINCKY Work with For Makita/Bosch/Dewalt/Milwaukee/Black&Decker For Ryobi 18V Li-ion Battery. 

The red wire is connected to the positive battery terminal, and the black wire is connected to the negative battery terminal.
Easy to install,locks on you battery very well.
Adapter has 12cm of 14 gauge wire installed
Suitable for high power applications.

Specifications:
Color: Black
Battery Voltage:18 V
Item size:95x74x33mm
Item weight:60g

Package included:
1 x Battery Adapter

Notes:
1. Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.
2. Please allow slight dimension difference due to different manual measurement.

with a fuse:
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 For Milwaukee M&18 18V Li-ion batteries.
*Model of compatible battery: Suit for Milwaukee M&18 battery 18V series.
*This battery adapter/cover has been tested to work with For DeWALT 20V Li-ion batteries.
*Perfectly compatible : work with for Dewalt 20V /18V DCB200 DCB203 DCB205 DCB206 Li-ion batteries.
*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.