The FXONE Replacement Battery is universal for all FXONE tools. Enjoy up to 3 hours of runtime. The 4-stage LED ring indicating battery life helps barbers and stylists charge efficiently. Be prepared with spare batteries to always keep your tools fully charged. The new FXONE system is a one-battery system compatible with all FXONE tools, including BLACKFX, GOLDFX and LO-PROFX.