Odyssey ODP-AGM31M · Marine battery 87Ah 925A AGM

Marine battery Odyssey ODP-AGM31M ODP 87Ah 925A

The Odyssey ODP-AGM31M with AGM technology is a marine battery with 87 Ah and 925 A of cold cranking current (EN) for motor and sailing boats, both for engine starting and onboard services. Measuring 328 × 173 × 254 mm and the positive terminal on the left, it is the direct replacement for boats fitted from the factory with a 87 Ah battery of this format.

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

What the Odyssey ODP-AGM31M is for

With 87 Ah, the Odyssey ODP-AGM31M 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 a weight of 28.70 kg and M terminals.

Will it fit your current battery tray?

The Odyssey ODP-AGM31M is made in the 328 × 173 × 254 mm format and weighs 28.70 kg. 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 M terminals, the system that anchors and connects it in the vehicle. Before replacing it, measure your current battery tray: if all three dimensions and the terminal positions match, the swap is direct and needs no adapters.

Why choose Odyssey batteries

Odyssey batteries combine starting and deep cycling in a single sealed pure-lead unit, with some of the longest warranties on the market. We guarantee that every Odyssey arrives new, charged and with the manufacturer's full warranty.

The Odyssey ODP-AGM31M: ODP range and AGM technology

Within the Odyssey catalogue, the ODP series groups the references designed for this use. The ODP-AGM31M is the 87 Ah model of that family, with the same performance as its siblings in other sizes.

In an AGM battery the electrolyte is absorbed in glass-fibre separators: there is no free liquid, it cannot spill and it can be mounted at an angle. That construction lowers internal resistance, speeds up recharging and multiplies cycle life compared with a conventional battery.

How to make it last longer

As a service battery, avoid routine discharges below 50% to extend its cycle life. Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators.

Manufacturer's warranty

The Odyssey ODP-AGM31M comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.

Shipping, delivery 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.