Replacement battery for GPS. Specifications: 1050mAh, 3.7V, Li-ion. Compatible with: GPS. Replaces: Firedog Golf GP50301HG026, Firedog Golf XL2300, GP50301HG026, SG1, SG2, SG2BATT and 2 more. Firedog Golf replacement battery designed for GPS devices. A precise, secure fit you can rely on.