# Car battery Odyssey ODX-AGM34 68Ah 850A AGM

![Car battery Odyssey ODX-AGM34 68Ah 850A AGM](https://baterias.com/1414-home_default/battery-odyssey-odx-agm34-68ah-850a.jpg)

> Odyssey ODX-AGM34 car battery 68Ah 850A AGM. ODX range. Dimensions 277×173×201 mm, + terminal on the left. Check fitment by plate.

**Category:** [Car Batteries](https://baterias.com/gb/car-batteries) → [ODYSSEY](https://baterias.com/gb/odyssey)

- **Canonical URL**: https://baterias.com/gb/battery-odyssey-odx-agm34-68ah-850a
- **Language**: en-GB
- **Brand**: ODYSSEY
- **Reference**: BCOM-ODYSSEY-ODX-AGM34
- **EAN**: 0635241140729
- **MPN**: ODX-AGM34
- **Price**: 455,80 €
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | ODYSSEY |
| Reference | ODX-AGM34 |
| Model | ODX |
| Largo | 277 cm |
| Ancho | 173 cm |
| Alto | 201 cm |
| Peso | 22.5 kg |
| Tecnología | AGM |
| Terminal layout | Positive terminal on the left |
| Terminal type | SAE |
| Cold cranking amps (EN) | 850 |
| Capacity (C20) | 68 Ah (c20) |
| Capacity (C10) | 62 Ah (c10) |

## Quick description

**Odyssey ODX-AGM34 68Ah 850A** is a ready-to-use passenger car battery, sealed and maintenance-free. Delivers the cranking amps the engine needs in cold weather and keeps stable voltage for modern car loads (ECU, sensors, climate control, infotainment).

## Why this car battery?

- **Original-equipment quality** without dealership prices
- **Lasts 4 to 6 years** buy once instead of twice
- **Real human tech support** if you have any doubts before buying

⚡ Capacity
68 Ah C20

🔋 Cold cranking
850 A SAE

📏 Dimensions
277×173×201 mm

⚙️ Technology
AGM

🧭 Polarity
Positive on the left

⚖️ Weight
22,5 kg

🏷️ Model
ODX

## Description

## Car battery Odyssey ODX-AGM34 ODX 68Ah 850A

68*Ah* Capacity
850*A* Cold cranking
22.50*kg* Weight

The **Odyssey ODX-AGM34 car battery** is rated at **V**, **68 Ah** and **850 A** of cold cranking current (EN) from the **ODX** range, and is designed for passenger cars with conventional starting, without a Start-Stop system. Measuring 277 × 173 × 201 mm and the positive terminal on the left, it is the direct replacement for cars fitted from the factory with a 68 Ah battery of this format.
- AGM: faster recharging and better cycle resistance than a conventional battery.
- Stable voltage for the vehicle electronics (ECU, sensors, climate control).
- Low self-discharge: copes with long stops without losing charge.
- Designed to last several years under normal daily use.

### What the Odyssey ODX-AGM34 is for

With 68 Ah, the Odyssey ODX-AGM34 is sized for passenger cars with conventional starting, without a Start-Stop system. It is a direct replacement for the original battery as long as dimensions and terminals match. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 22.50 kg and SAE terminals.

### Dimensions, polarity and mounting

In terms of format, the Odyssey ODX-AGM34 measures 277 × 173 × 201 mm (length × width × height) and weighs 22.50 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 SAE 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.

### What Odyssey does differently

Odyssey batteries combine starting and deep cycling in a single sealed pure-lead unit, with some of the longest warranties on the market. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.

### The Odyssey ODX-AGM34: ODX range and AGM technology

The ODX-AGM34 is part of the Odyssey **ODX** range. Choosing the right reference within the series comes down to capacity, dimensions and terminals: technology and quality are common to the whole family.
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.

### Care and maintenance

Avoid leaving lights or accessories on with the engine off: most batteries fail not through defects but through repeated deep discharges. Keep the terminals clean and tight, and check that the resting voltage does not drop below 12.4 V: below that it is time to recharge.

### Official warranty

The Odyssey ODX-AGM34 comes with the **manufacturer's official warranty** against manufacturing defects; the exact period is stated in the brand's conditions. If it fails through a defect within the period, we replace it free of charge.

### Delivery times and returns

Order **before 6:00 pm** with stock available and it leaves today: mainland Spain and Portugal receive it in 24-48 working hours, the islands and the rest of the EU in 3 to 5 days. You have **14 days** to return it if it has not been installed, with free collection on the mainland, and shipment tracking by email.

## Frequently asked questions

### Is this battery AGM? What is it for?

Yes. The ODX-AGM34 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 cars with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.

### Is the ODX-AGM34 model suitable for Start-Stop cars?

Yes. As AGM technology it is designed for Start-Stop vehicles. AGM batteries support advanced Start-Stop and regenerative braking thanks to their higher cycle count. EFB is recommended for basic Start-Stop; AGM is recommended when regenerative braking is also present, thanks to its higher cycle capability. It works straight out of the box — on most modern vehicles registering the battery via OBD is recommended so the alternator automatically applies the optimal charging profile.

### How is the Odyssey ODX-AGM34 battery installed in the vehicle?

In most cars 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 our blog. 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 — with positive on the left match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (−). On cars with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.

### How many years does this battery last?

Expected lifespan of the Odyssey ODX-AGM34 is 5 to 8 years in mild-climate car 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 measurements of the ODX-AGM34 model?

Dimensions (length × width × height) are 277×173×201 mm — also written as 277x173x201 mm — following the European DIN standard. Always measure the space in your car before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### On which side is the positive of the ODX-AGM34 model?

Polarity: positive on the left. To identify it, place the battery in front of you with the terminals facing you and check which side the positive (+, marked with a red ring) is on. Before buying, verify the polarity matches your current battery: switching polarity forces longer cables or system reconfiguration, with short-circuit risk.

### Will the Odyssey ODX-AGM34 battery fit my car?

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-AGM34 typically fits a wide range of European vehicles thanks to its standard DIN case format.

### Which batteries are equivalent to the Odyssey ODX-AGM34?

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 cars. See the "Equivalents" section to view recommended options at the same performance level.

### What advantages does the Odyssey ODX-AGM34 AGM battery offer over an EFB?

AGM (Absorbent Glass Mat) technology uses absorbent fibreglass that retains the electrolyte, eliminating leaks and allowing up to 3× more charge/discharge cycles than a conventional battery. It is the recommended option when the car has advanced Start-Stop with regenerative braking (BMW EfficientDynamics, Mercedes Eco, Audi MHEV, Land Rover ECO, Volvo i-Stop). Withstands tilted positions, high vibration and extreme temperatures better than EFB. The Odyssey ODX-AGM34 is fully original and meets European EN 50342-6 standards for advanced Start-Stop.

### Is there anything to do after replacing a Start-Stop battery?

On most cars it is not strictly necessary — the alternator detects the new battery and adapts the charge automatically. It is recommended to register the battery via OBD so that the alternator applies the optimal charging profile from the first minute and extends the battery life as much as possible (especially on brands with sophisticated BMS: BMW, Mercedes, Audi, Volvo, Land Rover). Any workshop with an OBD scanner (~10-15 € labour) does it in 5 minutes. DIY apps: VCDS / Carista (VAG), Bimmercode (BMW), iCarsoft. If you do not register, the car will still start correctly — the alternator just takes a few days to adjust the profile. The Odyssey ODX-AGM34 ships factory-charged at 80-90% so you can use it straight after fitting.


## Technical team (editorial authorship)

The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — automotive battery specialists since 2012.

→ https://baterias.com/gb/technical-team

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*baterias.com — Automotive batteries · 2026-10-24*