Exide ER350 · Marine battery 12V 80Ah 570A
Specifications
| Brand | EXIDE |
|---|---|
| Part number | ER350 |
| Voltage (V) | 12 |
| Capacity (C20) | 80Ah (c20) |
| Cold cranking amps (EN) | 570A |
| Technology | Lead-acid |
| Length | 270.00 cm |
| Width | 173.00 cm |
| Height | 222.00 cm |
Exide ER350 12V 80Ah 570A 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

Marine battery Exide ER350 Marina Dual Er 80Ah 570A 12V
The Exide ER350 marine battery offers 12 V, 80 Ah and 570 A of cold cranking current (EN) from the Marina Dual Er range with conventional lead-acid technology, designed for motor and sailing boats, both for engine starting and onboard services. Measuring 270 × 173 × 222 mm and the positive terminal on the left, it is the direct replacement for boats fitted from the factory with a 80 Ah battery of this format.
- Good balance of capacity, cranking power and price.
- Ready for starting outboard and inboard engines.
- Sealed: no spills or gases in the locker.
- Resistant to humidity and salt air.
Dimensions, polarity and mounting
It has external dimensions of 270 × 173 × 222 mm and weighs 17.80 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 a Korean B1+B6 hold-down and 1 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 the Exide ER350 is for
The Exide ER350 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 17.80 kg, 1 terminals and Korean B1+B6 hold-down.
The Exide ER350: Marina Dual Er range and conventional lead-acid technology
Within the Exide catalogue, the Marina Dual Er series groups the references designed for this use. The ER350 is the 80 Ah model of that family, with the same performance as its siblings in other sizes.
The conventional lead-acid battery remains the most widespread technology thanks to its balance of capacity, cranking current and price. Well maintained and kept charged, it offers years of reliable service in vehicles without Start-Stop.
What Exide does differently
With more than a century of history, Exide Technologies manufactures automotive, marine, motorcycle and industrial batteries in Europe. Its presence as original equipment on assembly lines vouches for the quality of every reference. All the Exide batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty.
Official warranty
The Exide ER350 comes with the manufacturer's official warranty against manufacturing defects. Deep discharge from winter lay-up without charging is not covered.
How to make it last longer
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.
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 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.
Data sheet
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BrandEXIDE
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ReferenceER350
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ModelEXIDE MARINA DUAL ER
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Voltage (V)12
-
Length270.00 cm
-
Width173.00 cm
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Height222.00 cm
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Weight17.80 Kgs
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TechnologyLead-acid
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EAN3661024036009
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Terminal layoutPositive terminal on the left
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Terminal type1
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Hold-downKorean B1+B6
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Cold cranking amps (EN)570A
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Capacity (C20)80Ah (c20)
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Case typeD26
Specific References
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EAN133661024036009
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MPNER350
Codes and references Exide ER350
| Brand | Exide · see all Exide batteries |
|---|---|
| Manufacturer range | EXIDE MARINA DUAL ER |
| Manufacturer part number (MPN) | ER350 |
| EAN-13 barcode | 3661024036009 |
| Dimensions (length × width × height) | 270 × 173 × 222 mm (270x173x222) |
Recommended accessories
Frequently asked questions
How do I change this battery step by step?
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 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 boats with Start-Stop or BMS, register the battery via OBD so the alternator applies the correct charging profile.
How long does the Exide ER350 battery last?
Expected lifespan of the Exide ER350 is 4 to 6 years in regular boat use without 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 Exide ER350 battery?
Dimensions (length × width × height) are 270×173×222 mm — also written as 270x173x222 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.
What polarity does the Exide ER350 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.
Is the ER350 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 ER350 typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Exide ER350?
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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