Product Description About this item 【Well Compatible】Suitable for Makita 18V B-Series lithium batteries and replacement batteries: BL1860B/BL1850/BL1840/BL1830B/BL1815... 【MT18BAU Advantage】Fits well for Bauer 20V Cordless Tools, which means you can use your old batteries to for Bauer 20V power tools. Let you Enjoy the benefits of extended run-time of Li-Ion Batteries on your existing 20V tools. 【Material Guarantee】Made of high quality ABS plastic, solid design, made of high quality material, durable and safe, convenient to carry and easy to use. 【Notice】It cannot be used to charge the battery of a power tool, and the adapter cannot be plugged into any charger. If you need to charge the power tool battery, use the original battery charger. Note: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Manual measurement, please allow 1-10mm error. Thanks for your understanding. WARNING: Make sure that the battery is fully inserted for normal use Please do not force into the battery pack, if the battery pack can not be installed, the installation method may be wrong This product is only compatible with the tools, not compatible with the charger, Do not use the adapter to charge the battery When you need to charge the battery, remove the converter