Description
The US Battery US AGM 31 is a robust 12V 117Ah deep-cycle AGM battery in U.S. Battery's Group 31 case — the largest of the standard 12V group sizes in their AGM lineup. It's a maintenance-free, sealed solution for marine equipment, RVs, and floor scrubbers that need maximum single-battery runtime in a Group 31 footprint.
This is the top of the standard 12V group-size ladder before you're into the large-format 4D and 8D cases — if Group 24 and Group 27 haven't given you enough runtime and you don't want to jump to an 8D's size and weight, Group 31 is the last stop that still fits a conventional single-battery tray. Sealed and valve-regulated, it eliminates watering and leak risk entirely.
Why choose the US AGM 31
- 117Ah of deep-cycle capacity — the largest standard 12V group size in the AGM lineup
- F12 terminal for straightforward wiring into 12V systems
- The last conventional group size before stepping up to 4D or 8D
- Sealed, non-spillable AGM chemistry — zero maintenance
Specifications
| Model | US AGM 31 |
| Voltage | 12V |
| Capacity (20HR) | 117Ah |
| Capacity (5HR) | 96Ah |
| Reserve Capacity @75A | 45 min |
| Reserve Capacity @56A | 68 min |
| Reserve Capacity @25A | 207 min |
| Length | 12.9in (328mm) |
| Width | 6.77in (172mm) |
| Height | 8.66in (220mm) |
| Weight | 67 lbs (30.5kg) |
| Terminal | F12 |
| Case Material | ABS, Heat Sealed |
| Battery Type | Sealed AGM, Valve-Regulated |
Backed by U.S. Battery's manufacturer warranty. If Group 31 doesn't fit your equipment bay, ask us about the AGM 4D or 8D before ordering.