# Car battery Odyssey ODP-AGM78 61Ah 792A AGM ![Car battery Odyssey ODP-AGM78 61Ah 792A AGM](https://baterias.com/1375-home_default/battery-odyssey-odp-agm78-61ah-792a.jpg) > Odyssey ODP-AGM78 car battery 61Ah 792A AGM. ODP range. Dimensions 274×173×188 mm, + terminal on the left. Check fitment by plate. **Category:** [Car batteries equipped with start stop system](https://baterias.com/gb/car-batteries-equipped-with-start-stop-system) → [ODYSSEY](https://baterias.com/gb/odyssey) - **Canonical URL**: https://baterias.com/gb/battery-odyssey-odp-agm78-61ah-792a - **Language**: en-GB - **Brand**: ODYSSEY - **Reference**: BCOM-ODYSSEY-ODP-AGM78 - **MPN**: ODP-AGM78 - **Price**: 496,50 € (VAT incl., Spain) - **Last updated**: 2026-10-28 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | ODYSSEY | | Reference | ODP-AGM78 | | Model | ODP | | Largo | 274 cm | | Ancho | 173 cm | | Alto | 188 cm | | Peso | 21.4 kg | | Tecnología | AGM | | Terminal layout | Positive terminal on the left | | Terminal type | Side | | Cold cranking amps (EN) | 792 | | Capacity (C20) | 61 Ah (c20) | | Capacity (C10) | 57 Ah (c10) | ## Quick description **Odyssey ODP-AGM78 61Ah 792A** 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 61 Ah C20 🔋 Cold cranking 792 A SAE 📏 Dimensions 274×173×188 mm ⚙️ Technology AGM 🧭 Polarity Positive on the left ⚖️ Weight 21,4 kg 🏷️ Model ODP ## Description ## Start-Stop battery Odyssey ODP-AGM78 ODP 61Ah 792A 61*Ah* Capacity 792*A* Cold cranking 21.40*kg* Weight The **Odyssey ODP-AGM78** with AGM technology delivers the **61 Ah** at **V** and **792 A** of cold cranking current (EN) that cars with Start-Stop, regenerative braking and heavy electrical loads need. Its 274 × 173 × 188 mm and the positive terminal on the left make it the exact replacement for the 61 Ah battery fitted as standard to many Start-Stop cars. - Direct replacement for the original Start-Stop battery. - Keeps comfort loads running with the engine off at the lights. - Fast recharge on the move thanks to low internal resistance. - AGM: faster recharging and better cycle resistance than a conventional battery. ### What the Odyssey ODP-AGM78 is for With 61 Ah, the Odyssey ODP-AGM78 is the replacement for cars with Start-Stop, regenerative braking and heavy electrical loads. After the swap it may be necessary to register the new battery in the ECU so that energy management works correctly. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 21.40 kg and Side terminals. ### Will it fit your current battery tray? It has external dimensions of 274 × 173 × 188 mm and weighs 21.40 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 Side 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 ODP-AGM78: ODP range and AGM technology The **ODP** is the Odyssey range the ODP-AGM78 belongs to: it shares the same construction and quality criteria with the rest of the series, and varies in capacity and format to suit each vehicle. AGM (Absorbent Glass Mat) technology seals the electrolyte in glass microfibre. The result is a maintenance-free battery that is highly vibration-resistant and able to withstand deep discharges that would ruin a classic lead-acid battery. ### What Odyssey does differently Odyssey, part of the EnerSys group, makes thin-plate pure-lead (TPPL) batteries: extreme cranking, total vibration resistance and very long service life in motorsport, 4x4, marine and demanding vehicles. We guarantee that every Odyssey arrives new, charged and with the manufacturer's full warranty. ### Manufacturer's warranty The Odyssey ODP-AGM78 comes with the **manufacturer's official warranty**. To keep it valid, always fit the same technology as the original battery (AGM or EFB) and register the replacement if your vehicle requires it. ### Care and maintenance Charge with a charger that has an AGM mode: it limits the voltage and protects the glass-fibre separators. In a Start-Stop car the battery is controlled by the ECU; after replacing it, the new battery may need to be registered so the system adjusts charging. ### 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. ## Frequently asked questions ### Is this battery AGM? What is it for? Yes. The ODP-AGM78 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 Odyssey ODP-AGM78 battery suitable for Start-Stop? 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. ### What should I bear in mind when fitting this Start-Stop battery? 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. Also, the negative terminal usually carries a battery sensor (IBS): undo the cable at the terminal nut without removing the sensor. Always replace it with the same technology (AGM or EFB) or higher: a conventional battery wears out within months with Start-Stop. ### What is the service life of the ODP-AGM78 model? Expected lifespan of the Odyssey ODP-AGM78 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 size is this battery? Dimensions (length × width × height) are 274×173×188 mm — also written as 274x173x188 mm and correspond to the European L3 case size — 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. ### What polarity does the Odyssey ODP-AGM78 battery have? 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 ODP-AGM78 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 ODP-AGM78 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Odyssey ODP-AGM78? 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 ODP-AGM78 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 ODP-AGM78 is fully original and meets European EN 50342-6 standards for advanced Start-Stop. ### Do I need to register the Odyssey ODP-AGM78 on the car after installation? 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 ODP-AGM78 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 --- *baterias.com — Automotive batteries · 2026-10-31*