Features: Converter Function: The battery adapter can make listed 20V max-lithium batteries use on for WORX-18V Ni-MH cordless power tools , and let you Enjoy the benefits-of extended run-time of Li-Ion Batteries on your existing 18V tools. Applicable Battery Model: The bottom of this adapter can allows for use of 20V lithiums batteries, Compatible with Worx-WA3520 WA3525 WA3575 WA3578 WA3511 WA3512 WG153 WA3512.1 WA3522 WA3523 WA3544 WA3671 WG151s WG251s WG255s WG540s WG545s WG890 WG891 20V Batteries etc. (Default without battery) Replace 18V NiMH Battery: Replacement for Worx-18V Ni-Mh Battery. Compatible with-Worx 18 V cordless power tools models WA3127 WA3152 WG150 WG150s WG152 WG250 WG541 WG900 WG901 WG901.1, But can not fit for Worx-20V tools. Convenient: This cordless power tools adapter made of ABS + PC material, strong and sturdy. Professional compact design and easy installation. Convenient to carry and easy to use. Size about 130x86x93mm/5.12x3.39x3.66inch(Approx.). Using Notes: 1.CANNOT charge battery with this Adapter! Please remove the adapter before charging battery (Use the original brand battery charger) ; 2. Maximum initials battery voltage(measured without a workload) is 20volts,Nominal voltage is 18volts. 3. Please remove it from the battery when not in use, Safe to use; Notice: 1.Actual color may be slightly different from the image due to different light effect 2.Please allow 1-3cm deviation due to manual measurement Description: Size: about 5.12x3.39x3.66inch. Made: ABS material Package Contents: 1x Adapter (Not Battery and Tools) This adapter converter is a tool that compatible with Worx-20V li-ion battery to make them apply to work on for WORX-18 Volts NiCad Ni-MH cordless tools. Package List: 1x Battery Adapter