Numax XV31MF 12V 105Ah Dual-Purpose Marine & Leisure Battery | 4Boats
XV31MF
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Numax XV31MF 12V 105Ah
Premium Sealed Deep Cycle & Starting Battery
The Numax XV31MF is a market-leading 12V 105Ah battery engineered to handle the dual demands of engine starting and deep-cycle auxiliary power. Built to high specifications, this battery is the go-to choice for boat owners, caravan enthusiasts, and motorhome users who require a reliable power source that can withstand frequent charge and discharge cycles while providing significant cranking power.
Key Features
- ✔ Dual Terminal Design: Standard posts & threaded studs
- ✔ Sealed Maintenance Free: No topping up required
- ✔ Magic Eye: Integrated state-of-charge indicator
- ✔ Enhanced Safety: Anti-flashback safety labyrinths
- ✔ Deep Cycle Capability: Up to 500 cycles
Technical Specs
| Voltage | 12V |
| Capacity (C20) | 105Ah |
| CCA (EN) | 740A |
| MCA | 925A |
| Length | 330mm |
| Width | 172mm |
| Height (Inc. Terminals) | 242mm |
| Weight | 23.2kg - 24.2kg |
| Polarity | Positive Front Left (Layout 1) |
Compatibility / Fitment Guide
| System / Application | Use Case | Notes |
|---|---|---|
| Marine & Boat | Yachts, Narrowboats, Motorboats | High MCA for reliable engine start. |
| Leisure & RV | Caravans, Motorhomes, Campers | Deep cycle for interior lighting & pumps. |
| Off-Grid Power | Solar Storage, Wind Turbines | Suitable for low-discharge storage applications. |
| Electric Equipment | Trolling Motors, Winches, Fencing | Dual terminals allow for secure bolting. |
OEM Cross Reference
| Numax Part Numbers | XV31MF, CXV31MF |
| Industry Standard Size | Group 31 Marine / 31MF |
| Equivalent Models | DC31MF, MSST31, HCM31SMF, M31 |
Questions & Answers
Is this a genuine original part?
Yes, this is an authentic Numax XV-Series battery. Numax is one of the most established battery brands in the UK, known for OE-quality performance in the leisure and marine sectors.
How do I know if it is compatible?
We recommend checking your current battery's dimensions (approx. 330mm x 172mm) and ensuring the positive terminal is on the left side. If your battery matches the 105Ah / XV31MF designation, this is a direct replacement.
What are the benefits of the dual terminal design?
The XV31MF features both standard automotive tapered posts and threaded 8mm studs. This allows you to connect engine starting cables to the main posts while securely bolting auxiliary electronics, solar chargers, or accessories to the threaded studs.
Note: Please verify your space constraints and polarity requirements before purchasing. Technical data sourced from official Numax specifications at 4boats.co.uk.
For the products under £150 the shipping is £6.99.
Free delivery for most items over £150.
