About this replacement
Designed for Rockwell, Worx devices. Compatible models include RK2510, RK2510K, RK2510K2, RK2510K2.1, RK2511, RK2511K2, RK2512, RK2512K, RK2512K2, RK2513, RK2513K2, RK2515K2. Replacement part numbers include WA3503, WA3509, WA3505. Key specifications: 12V, 1500mAh, Li-ion.