Your Murf deserves fresh power. Whether you're replacing a worn-out battery or keeping a spare on hand for longer adventures, this battery pack keeps you charged and ready to roll. Built with the same 52-volt system that powers every Murf, it delivers superior range, torque, and performance. Compatible with Murf bikes purchased between 2021–2025. 15amp is compatible with: Higgs ST, Higgs, Higgs Cargo, Gigi, Otis 20amp is compatible with: Alpha, Alpha ST, Alpha Cargo, Fat Murf, Fat Murf ST, Izzy Not sure which battery fits your bike? We'll help you lock in the right one. Reach out to our team: info@murfelectricbikes.com or 949-218-5920.