Product Description
Duracell Group 31 Deep Cycle Battery
The Duracell Ultra SLI31DTMAGMDC is a Group 31 AGM dual-purpose marine battery engineered for applications that require both dependable engine starting and consistent deep-cycle performance. Built with absorbed glass mat (AGM) technology, it delivers strong cranking power while supporting repeated discharge and recharge cycles without the maintenance of traditional flooded batteries. This makes it an ideal solution for marine, RV, and auxiliary power systems where one battery must confidently handle starting duties and onboard loads.
Features & Benefits
- Dual-Purpose Design – Supports both starting power and deep-cycle energy demands.
- AGM Construction – Maintenance-free operation with enhanced durability & longer lifespan.
- Marine Battery Performance – Stable, long-duration power for trolling motors and house loads.
- Group 31 – Direct-fit upgrade for many marine, RV, and auxiliary battery compartments.
- Dual Terminals – SAE Posts + M8 Studs for universal connections across boats, RVs, and equipment.
- High Vibration Resistance – Built to withstand rough water, road vibrations and constant movement.
- Low Self-Discharge – Holds charge longer during storage and seasonal downtime.
- No Core Charge - No fees or core return hassles.
Why Choose a Duracell RV Battery?
Duracell marine starting batteries are for users who don’t want to compromise between starting reliability and usable capacity. Whether powering marine electronics, RV house loads, or auxiliary systems, the SLI31DTMAGMDC delivers stable voltage and dependable performance cycle after cycle.
Duracell’s AGM engineering and proven quality standards provide peace of mind in applications where failure isn’t an option. If you need one battery to do the job of two, this Group 31 dual-purpose AGM is built for it.
| Voltage | 12V |
| Capacity | 110Ah |
| Type | Dual Purpose AGM |
| Cold Cranking Amps | 800A |
| Group Size | 31 / 31M |
| Terminals | M8 Studs (hardware included) SAE Posts |
| Polarity | + Left / - Right |
| Length | 12.90" (328 mm) |
| Width | 6.77" (172 mm) |
| Height | 8.50" (216 mm) 9.25" (235 mm) w/terminals |
| Weight | 72 lbs |
| Warranty | 30 Months |
Duracell SLI31DTMAGMDC Battery Cross-Reference
Replaces Group 31 Batteries w/Dual Terminals: 31M, 31M-AGM, 31MDP, 8A31DTM, 8G31DTM, D31M, NSB-AGM31M, ODX-AGM31M, PC2150M, SLI31AGMDPM, SLI31MDC, SLI31MDP.
Extend the Life of Your Battery
Keeping your battery charged between uses with a quality maintainer is essential for maximizing its lifespan. Save 10% on a NOCO Genius 10, NOCO 10A Marine, or Battery Tender 26A Charger & Maintainer when bundled with battery using the option above.
