Fulbat FDM12-825-M31 · Marine battery 12V 105Ah 825A AGM CARBON

Marine battery Fulbat FDM12-825-M31 105Ah 825A 12V

The Fulbat FDM12-825-M31 with AGM technology is a marine battery with 105 Ah and 825 A of cold cranking current (EN) for motor and sailing boats, both for engine starting and onboard services. Its 330 × 173 × 237 mm and the positive terminal on the left make it the exact replacement for the 105 Ah battery fitted as standard to many boats.

• Resistant to humidity and salt air.
• Sealed: no spills or gases in the locker.
• Ready for starting outboard and inboard engines.
• AGM: faster recharging and better cycle resistance than a conventional battery.

What the Fulbat FDM12-825-M31 is for

With 105 Ah, the Fulbat FDM12-825-M31 covers motor and sailing boats, both for engine starting and onboard services. At the end of the season, charge it fully before winter storage. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has DT terminals.

Dimensions, polarity and mounting

It has external dimensions of 330 × 173 × 237 mm. The positive terminal on the left decides which side the cables end up on: it is the detail that causes most buying mistakes, so check it before ordering. It uses DT terminals, the system that anchors and connects it in the vehicle. For a direct replacement, the current battery tray must accept these dimensions and the same terminal layout; otherwise adapters will be needed or the hold-down will change.

Fulbat: the maker behind the FDM12-825-M31

French brand Fulbat is a European reference in motorcycle, garden and leisure batteries: compact ranges, clear JIS codes and a consistent quality that workshops know well. All the Fulbat batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.

Technology inside the Fulbat FDM12-825-M31

Within the Fulbat catalogue, the FDM12-825-M31 is the 105 Ah model designed for this application.

AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly.

Care and maintenance

At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up. Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections.

Warranty and coverage

The Fulbat FDM12-825-M31 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.

Delivery times and returns

Same-day dispatch from our warehouse for in-stock orders placed before 6:00 pm: 24-48 working hours in mainland Spain and Portugal, 3 to 5 days in the islands and the rest of Europe. Returns are accepted for 14 days if the battery has not been used (free collection on the Iberian mainland). You will receive tracking by email.