Product Description
8A31DTM AGM Deep Cycle & Starting Battery
The 8A31DTM is a premium Group 31 AGM battery designed to deliver both reliable deep cycle energy and strong starting power. Built with advanced Absorbed Glass Mat (AGM) technology, this maintenance-free battery is ideal for Marine, RV and commercial applications that require consistent performance and durability in demanding environments. This dual-purpose AGM battery with 105 Ah capacity is engineered to handle deep discharges while still delivering powerful cranking amps for engine starts. The sealed design resists vibration, prevents electrolyte leakage, and allows for flexible installation positions. Whether you're powering trolling motors, RV's, or mobility applications, the 8A31DTM offers superior cycle life, faster recharging, and long-lasting energy.
Features & Benefits
- Dual-Purpose AGM Performance – Combines deep cycle capacity with strong starting power.
- High Tolerance to Deep Discharges – Delivers long service life with frequent deep cycle use.
- Compatibility – Replacement for marine, RV, and equipment applications using Group 31 batteries.
- Heavy Vibration Resistance – Rugged construction ideal for marine, RV and industrial environments.
- AGM Construction – Heavy-duty plates with Absorbed Glass Mat separators for greater durability.
- Temperature Tolerant – Dependable power over a wide range of ambient temperatures.
- Exceptional Cycle Life – Up to twice the life expectancy of standard lead-acid batteries.
- Group 31 – Replaces NAPA 8231, Odyssey ODX-AGM31M, Duracell SLI31DTMAGMDC, plus many others.
- Dual Terminal Design – 5/16" studs and SAE automotive posts for flexible installations.
- Duracell Replacement – Direct-fit upgrade from Duracell SLI31DTMAGMDC batteries.
- Made in the USA – Proudly manufactured by East Penn for trusted performance and quality.
Why Choose Platinum AGM Batteries?
P1 Battery Platinum AGM's are built for reliable power without the need for constant maintenance. Advanced AGM technology enables faster recharging, higher discharge rates, and outstanding resistance to deep-cycle abuse. The completely spill-proof, maintenance-free design features lower internal resistance along with up to twice the cycle life and twenty times the vibration resistance of conventional flooded batteries. This means less downtime on the charger and more productive time in the field. Proudly made in the USA by East Penn, P1 Platinum AGM batteries deliver the durability and value professionals expect in applications ranging from mobility devices and floor scrubbers, marine & off-grid energy.
Group 31 Deep Cycle Applications
- Marine: House battery banks, trolling motors, lighting, bilge pumps, and onboard electronics
- RVs: Durable power for appliances, electronics, and entertainment systems
- Industrial Equipment: Floor scrubbers, forklifts, pallet jacks, scissor lifts
- Solar Energy Storage: Off‑grid systems requiring robust deep‑cycle performance
- Standby Power: Emergency lighting, UPS systems, telecom backup
| Voltage | 12 Volts |
| Capacity | 105Ah |
| Group Size | 31 / 31M |
| Type | Dual Purpose AGM |
| Cold Cranking Amps | 800A |
| Marine Cranking Amps | 1000A |
| Reserve Capacity | 200 min |
| Terminals | 5/16"-18 Studs (hardware incl.) & SAE Posts |
| Polarity | + Left / - Right |
| Length | 12.94" (329 mm) |
| Width | 6.75" (171 mm) |
| Height | 8.50" (216 mm) 9.37" (238 mm) w/terminals |
| Weight | 67.5 lbs (30.6 kg) |
8A31DTM Battery Cross-Reference
Group 31 Batteries w/Automotive Posts: 1031MF/PMF, 1131MF/PMF, 1231MF/PMF31M, 15020258, 31-AGM-MT, 31M-AGM, 31MDP, 8231, 8272, 8A31DTM (Deka), 8A31DTM (P1), 8G31DTM, 9831DT, AGM31DT, D31M, DB8A31DTM, DC31DT, DP31CS, NSB-AGM31M, ODX-AGM31M, PC2150M, SLI31AGM, SLI31AGMDPM, SLI31DP, SLI31DTMAGMDC, SLI31MDC, SLI31MDP, SLI31PA/SA, SLI31PHP/SHP, SRM-31, XCA31-1400, XTR31-135.
Group 31 Batteries w/Studs or Bolt Terminals: 15020258, 31-AGM-MT, 31M, 31M-AGM, 31MDP, 31‑PC2150S, 7T31, 7T31P, 8231, 8272, 8A31DTM (Deka), 8A31DTM (P1), 8G31, 8G31DTM, 9831DT, AGM31DT, CT2500, D31M, DB8A31DTM, DC31DT, DP31CS, DP31DT, DURHR12-430C/FR-A, HEPPC2150T-M, NSB‑AGM31, NSB-AGM31M, ODX‑AGM31, ODX-AGM31M, MB137-120, MR137-120, PC2150M, SLI31AGMDP, SLI31AGMDPM, SLI31CS, SLI31DP, SLI31DTMAGMDC, SLI31MDC, SLI31MDP, SLI31PHP/SHP, SLR125, SRM-31, XCA31-1400, XTR31-135.
Group 31 Batteries w/Dual Terminals: 15020258, 31-AGM-MT, 31M, 31M-AGM, 31MDP, 8231, 8272, 8A31DTM (Deka), 8A31DTM (P1), 8G31DTM, 9831DT, AGM31DT, CBEV-31-DT, D31M, DB8A31DTM, DC31DT, DP31CS, NSB-AGM31M, ODX-AGM31M, PC2150M, SLI31DP, SLI31AGMDPM, SLI31DTMAGMDC, SLI31MDC, SLI31MDP, SLI31PHP/SHP, SRM-31, XCA31-1400, XTR31-135.
Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit and performance.
Recommended Chargers for the 8A31DTM
NOCO Genius 10 Amp Charger & Maintainer