Exide EX900 · Marine battery 12V 50Ah 800A AGM
Marine battery Exide EX900 12V 50Ah 800A AGM images
Specifications
| Brand | EXIDE |
|---|---|
| Part number | EX900 |
| Voltage (V) | 12 |
| Capacity (C20) | 50Ah (c20) |
| Cold cranking amps (EN) | 800A |
| Technology | AGM |
| Length | 260.00 mm |
| Width | 173.00 mm |
| Height | 206.00 mm |
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Exide EX900 12V 50Ah 800A 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
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Marine battery Exide EX900 Maxxima 50Ah 800A 12V
The Exide EX900 marine battery offers 12 V, 50 Ah and 800 A of cold cranking current (EN) from the Maxxima range with AGM technology, designed for motor and sailing boats, both for engine starting and onboard services. Its 260 × 173 × 206 mm make it the exact replacement for the 50 Ah battery fitted as standard to many boats.
- Resistant to humidity and salt air.
- Sealed: no spills or gases in the locker.
- Ready for starting outboard and inboard engines.
- AGM: faster recharging and better cycle resistance than a conventional battery.
What the Exide EX900 is for
With 50 Ah, the Exide EX900 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 17.90 kg, SAE S 3/8" side Terminal terminals and B7 hold-down.
Dimensions, polarity and mounting
The Exide EX900 is made in the 260 × 173 × 206 mm format and weighs 17.90 kg. It uses a B7 hold-down and SAE S 3/8" side Terminal 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 Exide EX900: Maxxima range and AGM technology
Within the Exide catalogue, the Maxxima series groups the references designed for this use. The EX900 is the 50 Ah model of that family, with the same performance as its siblings in other sizes.
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.
Why choose Exide batteries
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.
Manufacturer's warranty
The Exide EX900 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
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.
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.
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ReferenceBCOM-EXIDE-EX900
Data sheet
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BrandEXIDE
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ReferenceEX900
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ModelEXIDE Maxxima
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Voltage (V)12
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Length260.00 mm
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Width173.00 mm
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Height206.00 mm
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Weight17.90 Kgs
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TechnologyAGM
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EAN3661024036603
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Terminal layout9
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Terminal typeSAE S 3/8" side Terminal
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Hold-downB7
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Cold cranking amps (EN)800A
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Capacity (C20)50Ah (c20)
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Case typeG34
Specific References
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EAN133661024036603
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MPNEX900
Codes and references Exide EX900
| Brand | Exide · see all Exide batteries |
|---|---|
| Manufacturer range | EXIDE Maxxima |
| Manufacturer part number (MPN) | EX900 |
| EAN-13 barcode | 3661024036603 |
| Dimensions (length × width × height) | 260 × 173 × 206 mm (260x173x206) |
Recommended accessories
Frequently asked questions
Is the Exide EX900 an AGM battery and what are the benefits of AGM?
Yes. The EX900 from Exide 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 do I fit the EX900 model in my boat?
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 — 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.
What is the service life of the EX900 model?
Expected lifespan of the Exide EX900 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 Exide EX900 battery?
Dimensions (length × width × height) are 260×173×206 mm — also written as 260x173x206 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.
Will the Exide EX900 battery fit my boat?
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 EX900 typically fits a wide range of European vehicles thanks to its standard DIN case format.
Which batteries are equivalent to the Exide EX900?
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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