This Sun Joe 20 Volt Lithium-Ion Replacement battery will work on Sun Joe models TRJ600C Cordless Trimmer/Edger, HJ600C Cordless Hedge Trimmer. These long lasting batteries are quick charge in only 1-hour. They are ultra lightweight and give you more charges than a traditional battery. In addition there is no memory effect and self discharge is minimal so you can charge up and battery should be ready to go when you need them. It is always handy to have an extra battery around when using cordless products.