【Conversion Board】Compatible with Black&Decker 20V lithium batteries; Porter Cable 20V; Stanley 20V Li-ion 【Superior Converter】Compatible with Makita 18V BL series Li-ion power tools. For example: BL1815, BL1820, BL1830, BL1830B, BL1840, etc. 【Warning】Make sure the battery is fully inserted for normal use. Do not force it when inserting. If it does not fit, it may be installed incorrectly. 【Note】This product is only compatible with tools, not chargers. Do not use an adapter to charge the battery. When you need to charge the battery, please remove the converter. 【Package Included】1 x Adapter (Adapter only, batteries and tools are not included) Specifications: Output voltage 18v Input voltage 18v Package Dimensions 11.99 x 8 x 5.99 cm Product weight 141g