Specs (Quick Reference) Voltage: 12V Capacity: 51Ah @ C/20 (58Ah @ C/100) Dimensions (L × W × H): 8.99" × 5.47" × 9.26" (incl. terminals) Weight: 37.5 lb Recommended charge voltage @ 77°F (25°C): Cycle 13.8–14.6V; Float 13.4–13.6V Compatibility Notes (recommended to include on-site) Confirm your device requires Group N22 / 22NF size and G (T881) terminals before ordering. Many mobility devices use two batteries—check your owner’s manual for quantity and wiring.