Product Description
MR86-50 Marine Deep-Cycle Battery
The VMAX MR86-50 12V deep cycle marine battery delivers true AGM performance with a 50Ah capacity in a compact Group 21R case. It’s built for applications that need strong, steady power for extended periods.
Engineered using VMAX’s military-grade AGM construction, the MR86-50 features thick internal plates, tightly packed separators, and a sealed, maintenance-free design. The result is excellent vibration resistance, high output, and durability that holds up in the toughest environments.
Features & Benefits
- 50Ah Deep-Cycle Capacity – Designed for frequent deep discharges without loss of capacity.
- High Output – 450 cranking amps ensure reliable power in all weather conditions.
- AGM Construction – Heavy-duty plates with Absorbed Glass Mat separators for extreme durability.
- Heavy Vibration Resistance – Rugged construction ideal for marine, RV, and industrial environments.
- Group 21R – Direct-fit replacement for numerous marine, RV, and off-grid applications.
- Low Self-Discharge – Maintains a charge longer between uses than conventional flooded batteries.
- Temperature Tolerant – Dependable starting power in both high and low temperatures.
- M8 Insert Terminals – Includes new hardware for quick installation and secure connections.
- Left-Positive Polarity – Verify your current battery's terminal locations before purchase.
- Built for Commercial Use – VMAX takes pride in building Tough Batteries for Tough Applications.
VMAX Marine Series AGM
VMAX Marine deep cycle batteries are engineered for applications that demand consistent power and zero excuses. Built with thick, military-grade lead plates and tightly compressed AGM separators, they deliver true deep-cycle endurance, fast recovery, and consistent output—day after day.
These batteries are purpose-built for tough environments – from marine electronics & trolling motors, to house power banks. You get rugged construction, long runtime, and maintenance-free reliability in a single platform that handles long power draws and sustained cycling. When failure isn’t an option and compromises cost you, VMAX Marine AGM is built to perform.
| Voltage | 12V |
| Capacity | 50 Ah |
| Type | Deep-Cycle AGM |
| Marine Cranking Amps | 450A |
| Group Size | 21R |
| Length | 7.8" (198 mm) |
| Width | 6.60" (168 mm) |
| Height | 6.70" (170 mm) |
| Terminals | M6 Inserts (HW included) |
| Polarity | - Left / + Right |
| Weight | 32 lbs |
| Charging Current | 3 - 15 Amps |
| Charging Voltage | 14.4V - 14.9V |
| Float Voltage | 13.5V - 13.8V |
| Warranty | 1 Year |
MR86-50 Battery Cross-Reference
Group 21R Batteries: CT1250, SLR50, MB86-50.
Important: Always confirm your battery's electrical specifications, dimensions, and terminal configuration before purchase.
