Product descriptions 【Applicable Tools】The battery adapter can use listed lithium batteries for makita 12V/14.4V NI-MH cordless power tools and lets you enjoy the benefits of extended runtime of Li-ion batteries on your existing 12V/14.4V power tools. 【Applicable Batteries】for makita 18V Li-ion Battery to for makita 12V/14.4V NI-MH Battery Adapter is perfectly compatible with MAKITA 18V BL1830 batteries (BL1820, BL1830, BL1840, BL1860, BL1840, BL1840B, BL1850B, BL1860B, BL1890B, etc.). 【Easy to use and remove】This battery adapter can firmly connect the tool and the battery, will not loosen, will not slip, let you work with confidence. Adapter built-in voltage protection chip, meet FCC RoHS and CE safety test standards, made of high quality ABS plastic, safe and durable. 【Note】It cannot be used to charge power tool batteries. This adapter is not suitable for every battery charger. If the battery of the power tool is Converter bottom: Suitable for Makita 18V Battery: BL1850 BL1840 BL1830 BL1820 BL1815,etc. Converter top: Work on for makita 12V/14.4V NI-MH cordless power tools Note： This converter does not support for Charger