【Conversion Plate】Suitable for Black & Decker 20V lithium battery; suitable for Porter Cable 20V lithium battery; suitable for Stanley 20V lithium-ion battery 【Upper Converter】Compatible with Makita BL series 18V lithium-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 the battery into place. If the battery does not fit, it may have been 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, remove the converter. 【Package Contents】1 adapter (adapter only, batteries and tools not included) Specifications: Output voltage 18 V Input voltage 18 V Package dimensions 11.99 x 8 x 5.99 cm Product weight 141 g