1. 2 in 1 battery converter 2. Can install 2 batteries, strong battery life 3. It can be connected to an external charger to charge the battery 4. Easy to install,locks on you battery very well. the battery is not included! Made of high-quality materials, small and sturdy, reliable and Product name:battery converter Model:MIL18MIL-2IN1 for Suitable for electric drills, wrenches, and work lights. Note:Installation guide not included, Please check as much as possible to make sure the item is what you need. Tips:The product may be updated constantly ,Due To Different Batches, The Actual Product May Have Slight Differences Or Color Differences, Which Does Not Affect Use Color:Black Material:plastic Package Contents: 1 * battery converter 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.