Odyssey ODX-AGM34M · Marine battery 65Ah 880A AGM
Specifications
| Brand | ODYSSEY |
|---|---|
| Part number | ODX-AGM34M |
| Capacity (C20) | 65Ah (c20) |
| Capacity (C10) | 61Ah (c10) |
| Technology | AGM |
| Length | 277.00 cm |
| Width | 173.00 cm |
| Height | 198.00 cm |
| Weight | 23.10 Kgs |
€578.80
VAT included
Odyssey ODX-AGM34M 65Ah 880A is a marine battery, vibration- and deep-discharge resistant, suitable both for outboard engine starting and for onboard auxiliary services (navigation lights, GPS, sonar, fridge). Sealed and maintenance-free.
Why this marine battery?
- Marine designbuilt for boat swell and vibration
- Dual functionstarts the engine and powers onboard services
- Sealed and safemaintenance-free even when the boat rolls
Capacity
65 Ah
Cold cranking
880 A
Dimensions
277×173×198 mm
Technology
AGM
Polarity
Positive on the left
Weight
23,1 kg
Model
ODX
Marine battery Odyssey ODX-AGM34M ODX 65Ah 880A
65AhCapacity
880ACold cranking
23.10kgWeight
With 65 Ah at V and 880 A of cold cranking current (EN), the Odyssey ODX-AGM34M from the ODX range is built for motor and sailing boats, both for engine starting and onboard services. It measures 277 × 173 × 198 mm and the positive terminal on the left, the format sought by anyone replacing a 65 Ah battery in boats.
- Reinforced case against vibration and swell.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Tolerates the daily cycling of a boat in season.
- Powers onboard services: lights, sounder, GPS, fridge.
What the Odyssey ODX-AGM34M is for
The Odyssey ODX-AGM34M is designed for motor and sailing boats, both for engine starting and onboard services. If it is your starter battery, run the services from a separate battery; if it is a service battery, avoid routinely discharging it beyond 50%. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 23.10 kg and M terminals.
Dimensions, polarity and mounting
In terms of format, the Odyssey ODX-AGM34M measures 277 × 173 × 198 mm (length × width × height) and weighs 23.10 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.
The Odyssey ODX-AGM34M: ODX range and AGM technology
Within the Odyssey catalogue, the ODX series groups the references designed for this use. The ODX-AGM34M is the 65 Ah model of that family, with the same performance as its siblings in other sizes.
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.
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. All the Odyssey batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Warranty and coverage
The Odyssey ODX-AGM34M comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
Usage and maintenance tips
As a service battery, avoid routine discharges below 50% to extend its cycle life. Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections.
Shipping, delivery and returns
Orders placed before 6:00 pm with the battery in stock ship the same day. Delivery in mainland Spain and Portugal takes 24-48 working hours; for the Balearic and Canary Islands and the rest of the European Union allow 3 to 5 working days. You have 14 days to return an unused battery; in mainland Spain and Portugal collection is free. We email you the tracking number as soon as the parcel ships.
BCOM-ODYSSEY-ODX-AGM34M
Data sheet
- Brand
- ODYSSEY
- Reference
- ODX-AGM34M
- Model
- ODX
- Length
- 277.00 cm
- Width
- 173.00 cm
- Height
- 198.00 cm
- Weight
- 23.10 Kgs
- Technology
- AGM
- Terminal layout
- Positive terminal on the left
- Terminal type
- M
- Cold cranking amps (EN)
- 880
- Capacity (C20)
- 65Ah (c20)
- Capacity (C10)
- 61Ah (c10)
Specific References
- UPC
- 635241140842
- MPN
- ODX-AGM34M
Recommended accessories
How to change the battery
Guide to replace a marine battery (cranking or house) in 20-30 minutes. Moisture and vibration in marine environments require reinforced hold-downs and sealed copper terminals.
Step 1. Prepare the vehicle
Park on a flat surface, switch off the engine and remove the key. Make sure all lights and electrical accessories are off. Wait 1-2 minutes before starting.
Step 2. Locate the battery compartment
Usually under the passenger bench, engine room or a dedicated ventilated compartment. Verify the compartment is dry and well ventilated before opening.
Step 3. Disconnect the negative (−) terminal
Use the 10 mm wrench to loosen the negative cable nut (black, marked −) and remove the cable from the post. Move it aside so it cannot touch any bodywork.
Step 4. Disconnect the positive (+) terminal
Repeat with the positive cable (red, marked +). Important: never let a terminal touch metal of the car while the other is still connected.
Step 5. Remove the old battery
Marine batteries are heavy (15-50 kg). If it has rope handles, use them; otherwise have a carry strap ready. Secure the new one with metal hold-downs (not plastic) to resist sea-state vibration.
Step 6. Install the new battery
Place the battery in the same orientation as the old one (positive terminal on the same side). Tighten the hold-down clamp firmly.
Step 7. Connect the cables
Connect the positive (+) terminal first, then the negative (−). Tighten the nuts with the wrench until each terminal does not move. Apply anti-spark grease if you have any.
Step 8. Verify circuit + water protection
Apply dielectric grease on terminals to prevent salt-air corrosion. Check the engine charging circuit delivers 13.8-14.4 V at 2,000 rpm.
Frequently asked questions
Is the ODX-AGM34M model AGM? What does this technology offer?
Yes. The ODX-AGM34M from Odyssey uses AGM (Absorbent Glass Mat) technology: a sealed lead-acid battery where the electrolyte is absorbed in a glass-fibre mat. It withstands more charge/discharge cycles than a conventional one, handles heat better and is the required technology for boats with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.
How is the Odyssey ODX-AGM34M battery installed in the vehicle?
In most boats it fits in 15-30 minutes with a 10 mm wrench; if the battery is under the seat or in the boot the time can double. See the step-by-step guide on this page. Quick summary: 1) switch off the engine and remove the key; 2) locate the original battery (engine bay, boot or under seat); 3) disconnect the negative (−) terminal first, then the positive (+); 4) loosen the hold-down clamp and remove the old battery; 5) fit the new one in the same orientation — match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.
How long does the Odyssey ODX-AGM34M battery last?
Expected lifespan of the Odyssey ODX-AGM34M is 5 to 8 years in mild-climate boat use with Start-Stop. In cold regions it drops slightly due to cold-start stress; in very hot regions it also drops because of electrolyte evaporation. To extend its life: avoid deep discharges (headlights on with engine off), have the alternator checked yearly, and keep the battery clean and properly secured.
What are the dimensions of the Odyssey ODX-AGM34M battery?
Dimensions (length × width × height) are 277×173×198 mm — also written as 277x173x198 mm — following the European DIN standard. Always measure the space in your boat before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.
Is the ODX-AGM34M valid for my vehicle?
Three options to confirm: 1) enter your number plate in the finder (DGT/DVLA/KBA auto-detect your model and engine); 2) check the "Compatible vehicles" tab on this page, where we list every vehicle verified by our technical team; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The ODX-AGM34M typically fits a wide range of European vehicles thanks to its standard DIN case format.
What are the equivalents of the ODX-AGM34M model?
Directly interchangeable batteries (same dimensions, same polarity, same Ah and CCA) are the OEM equivalents from leading brands: Bosch, Tudor, Exide and, depending on the model, Banner or Yuasa. Exact equivalence depends on technology — an EFB cannot be replaced with a conventional battery in Start-Stop boats. See the "Equivalents" section to view recommended options at the same performance level.
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