RnB Innovations ML-3100 Lithium-ion Battery for Minelab FBS Metal Detectors Our Rechargeable Batt Pack is 12.5 volts. The Minelab Rechargeable is 9.6 volts. "It Does Matter" Our ML-3100 Weighs Only 10.47oz. The Minelab Slimpack Weighs 14.72oz. Charges in Less than 2 hours and will Hold 97% of that Charge in a Year! Smart Home Charger Shuts Off Automatically when fully Charged @ 12.5v shows a Green L.E.D. Compatible Metal Detectors: Minelab E-TRAC, Minelab Explorer II, Minelab Explorer S, Minelab Explorer SE, Minelab Explorer SE PRO, Minelab Explorer XS, Minelab Quattro MP, Minelab Safari