Product Description
VMAX XTR31-135 Dual-Purpose AGM Battery
The VMAX XTR31-135 is a 12V AGM marine battery built for dual-purpose use—strong cranking and true deep-cycle service. It delivers 1,150 CCA for reliable engine starts and 135Ah of deep-cycle capacity for trolling motors, house loads, and onboard electronics. The sealed, maintenance-free AGM design is vibration-resistant and mountable in multiple orientations. Dual marine terminals (5/16″ studs + SAE posts) simplify installation in boats, RVs, and industrial equipment.
XTR31-135 Features:
- High Marine Cranking Power – 1,500 MCA / 1,150 CCA for rapid, reliable engine starting
- 135Ah Deep-Cycle Capacity – Provides long runtime for trolling motors, inverters, and onboard electronics
- Military-Grade AGM – Heavy-duty plates with premium Absorbed Glass Mat separators for extreme durability
- Dual Terminal Design – 5/16" studs plus SAE posts provide versatile connection options
- Shock & Vibration Resistant – Designed for marine, RV, off-road, and industrial use
- Dual Terminals (5/16" Studs & SAE Posts) – Connection versatility for numerous applications
- Drop-in Replacement – Group 31 is a common size for boats, RVs, and equipment
- Low Self-Discharge – Holds charge for months between uses
Why Choose the XTR31-135?
Part of the VMAX Xtreme AGM line, the XTR31-135 Group 31 AGM marine battery pairs heavy-duty plates with high-porosity AGM separators for high cranking power and true deep-cycle durability. Its sealed, non-spillable, maintenance-free design reduces corrosion and resists shock and vibration on boats and RVs. In standby/float service, it offers an expected 10–12-year service life—delivering long, reliable performance from a brand enthusiasts trust.
Applications:
- Marine: Starting, Trolling and Electronics
- RVs: Starting needs and high capacity house banks
- Backup Power: Inverter Systems & Off-Grid Power
- Trolling Motors: Perfect for large motors with high thrust ratings
- Commercial & Industrial: Floor Scrubbers, Liftgates, Utility Vehicles
- Mobility: Golf Carts, Track Chairs and other large mobility devices
XTR31-135 Battery Cross Reference
Group 31 Replacement for: 1031MF/PMF, 1131MF/PMF, 1231MF/PMF, 31‑PC2150S, 7T31, 7T31P, 8A31DTM, 8G31, 8G31DTM, CT2500, DC31DT, DP31CS, DP31DT, DURHR12-430C/FR-A, HEPPC2150T-M, MB137-120, MR137-120, NSB‑AGM31, ODX‑AGM31, SLI31AGM, SLI31AGMDPM, SLI31CS, SLI31DTMAGMDC, SLI31DP, SLI31MDC/MDCP, SLI31PA/SA, SLI31PHP/SHP, SLR125, XCA31-1400.
Important: Always confirm your battery's dimensions, terminal configuration, and specifications before purchase to ensure proper fit.
| Voltage | 12V |
| Capacity | 135 Ah |
| Type | Dual Purpose AGM |
| Marine Cranking Amps |
1,500 Amps |
| Cold Cranking Amps | 1,150 Amps |
| Group Size | 31 / 31M |
| Length | 12.90" |
| Width | 6.77" |
| Height | 8.66" 9.84" w/terminals |
| Terminals | 5/16" Studs (HW included) & SAE Posts |
| Polarity | + Left / - Right |
| Weight | 78 lbs |
| Charging Current | 13 - 20 Amps |
| Charging Voltage | 14.4V - 14.9V |
| Float Voltage | 13.2V - 13.8V |
| Float Service Life | 10 - 12 Years |
| Warranty | 1 Year |
