Original New Worx 18V 18-Volt 4.0Ah Lithium-Ion Cordless Power Tool Battery For 18V Grass String Trimmer/Edger Blower Replace The 18V Battery Worx WA3512&WA3512.1&Rockwell RW9161&JCB&Truper Worx 18V 4.0Ah High Capacity Original New Only Used For Worx 18V Cordless Power Tool Replace the 18V Battery of Worx & JCB & Truper & Rockwell Lithium Ion batteries have no memory effect and self-discharge is minimal