[Conversion function] This adapter is for Makita 18V battery BL1840 BL1840B BL1850 BL1850B BL1860 BL1860B BL1890 batteries, converting your for Makita 18V battery into for Dewalt 12V-14.4V Ni-MH Battery. [Compatibility] The battery adapter Work for Makita 18V Lithiun Battery Fits for Aeg for RidGid 12V cordless power tools,(Note:Adapter only,no battery). [Perfect battery converter] Made of high quality plastic material, it withstands high temperatures and falls. Save your money and rest assured to use tools. [Advantage]: Made of high quality materials, robust, portable design, easy to use. This product is only a battery adapter, not a battery charger, can not be used to charge the electric tool battery. Easy to DIY operateBattery DIY converter, make full use of home batteries. The products are only used for flexible conversion between one tool and another lithium battery, and do not involve any other brands! The products are only converter, not charger, not battery, not machine, also can not recharge battery by it. Due to different production batches, labeling is random and does not accept designation and does not affect use. Note: Installation guide not included, we strongly recommend you seek professional installation. Please check as much as possible to make sure the item is what you need. Color: Black Material: plastic Package Contents: 1 x Adapter (battery not included)