Whites Nimh Battery for V3, Dfx, Xlt, MXT M6 Metal Detector Standard Equipment with Spectra V, also works well as a premium rechargeable battery for DFX, XLT, MXT, M6. Must be charged with 509-0042 or 509-0037 and 802-5285 Charger and Charger Stand. Three hours to full charge, longer life per charge compared to NiCad Rechargeable batteries.