GRW40DW20 battery adapter converts for Greenworks 40V lithium batteries to for 20V max lithium battery, use Compatible for 20V cordless power tools. Fully utilize high-capacity batteries for longer and more convenient use of Cordless power tool,relax outdoor and indoor working anytime.Superior Compatibility: This battery adapter convert buttom compatible for Greenworks 40V Battery G-MAX 29472 29462 29252 20202 22262 25312 25322 20642 22272 27062 etc., Convert top Use for 20V cordless drill,Impact Driver,Brushless, chain saws, lights, blowers tools and other outdoor tool.Safe & Reliable: convert adapter built-in voltage protection chip, made of high quality ABS plastic, safe and .Easy to Install: This adapter is designed to compatible with 20V tools, much easier to remove than original adapters,fits well and work great.An Adapter Not A Battery: This can compatible with 20V battery adapter, Converter can' be used for power charging, this adapter not fit into any chargers.(Please remove the adapter before charging battery).Color: BlackMaterial: ABSPackage Contents:1* Battery AdapterOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.