Features: for- For A3 battery conversion for 2 in 1 battery converter Can install 2 batteries, strong battery life It can be connected to an external charger to charge the battery Easy to install,locks on you battery very well. Specifications: Product Name: battery converter Please Note: (1). This product does not come with a battery! (2). Please carefully confirm if you have the same battery as described below, otherwise do not place an order! The products are only converter, not charger, not battery, not machine! 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 x 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.