# Marine battery Exide ER850 12V 180Ah 1000A ![Marine battery Exide ER850 12V 180Ah 1000A](https://baterias.com/3467-home_default/battery-exide-er850-12v-180ah-850wh-1000a.jpg) > Exide ER850 marine battery 12V 180Ah 1000A. MARINA DUAL ER range. Dimensions 513Γ—223Γ—223 mm, + terminal on the left. Cranking and house duties. **Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) β†’ [EXIDE](https://baterias.com/gb/exide) - **Canonical URL**: https://baterias.com/gb/battery-exide-er850-12v-180ah-850wh-1000a - **Language**: en-GB - **Brand**: EXIDE - **Reference**: BCOM-EXIDE-ER850 - **EAN**: 3661024037440 - **MPN**: ER850 - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | EXIDE | | Reference | ER850 | | Model | EXIDE MARINA DUAL ER | | Voltage (V) | 12 V | | Largo | 513 mm | | Ancho | 223 mm | | Alto | 223 mm | | Peso | 46.1 kg | | TecnologΓ­a | Flooded | | EAN | 3661024037440 | | Terminal layout | Positive terminal on the left | | Terminal type | EN taper post | | Hold down | B0 | | Cold cranking amps (EN) | 1000 A | | Capacity (C20) | 180 Ah (c20) | | Case type | D05 | | Energy (Wh) | 850 Wh | ## Quick description **Exide ER850 12V 180Ah 1000A** is a marine battery with reinforced anti-vibration case for moorings and offshore use. Tolerates the typical daily cycles on a boat (engine start + night-time services such as lights, sonar, fridge) and holds voltage even when the hull is rolling in open sea. ## Why this marine battery? - **Marine design** built for boat swell and vibration - **Dual function** starts the engine and powers onboard services - **Sealed and safe** maintenance-free even when the boat rolls πŸ”Œ Voltage 12 V ⚑ Capacity 180 Ah C20 πŸ”‹ Cold cranking 1000 A EN-1 πŸ“ Dimensions 513Γ—223Γ—223 mm βš™οΈ Technology Lead-acid 🧭 Polarity Positive on the left βš–οΈ Weight 46,1 kg 🏷️ Model EXIDE MARINA DUAL ER ## Description ## Marine battery Exide ER850 Marina Dual Er 180Ah 1,000A 12V 12*V* Voltage 180*Ah* Capacity 1,000*A* Cold cranking 46.10*kg* Weight With **180 Ah** at **12 V** and **1,000 A** of cold cranking current (EN), the **Exide ER850** from the **Marina Dual Er** range is built for motor and sailing boats, both for engine starting and onboard services. Its 513 Γ— 223 Γ— 223 mm and the positive terminal on the left make it the exact replacement for the 180 Ah battery fitted as standard to many boats. - Ready for starting outboard and inboard engines. - Good balance of capacity, cranking power and price. - Resistant to humidity and salt air. - Sealed: no spills or gases in the locker. ### What the Exide ER850 is for On board, the Exide ER850 provides 180 Ah with a case reinforced against vibration and swell. Keep the terminals clean and protected from salt humidity. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 46.10 kg, EN taper post terminals and B0 hold-down. ### Size, terminals and hold-down of the Exide ER850 The Exide ER850 is made in the 513 Γ— 223 Γ— 223 mm format and weighs 46.10 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 a B0 hold-down and EN taper post 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 ER850: Marina Dual Er range and conventional lead-acid technology The **Marina Dual Er** is the Exide range the ER850 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. In a conventional battery the electrolyte is liquid and the lead plates are immersed in it. It is a mature, economical and easily recycled technology, ideal for starting vehicles in normal use. ### What Exide does differently Exide is one of the world's largest battery manufacturers and an original-equipment supplier to many car makers. Its European plants produce starter, industrial and leisure batteries under original-equipment quality controls. All the Exide batteries in our catalogue are genuine product, recently manufactured and covered by the manufacturer's warranty. ### Warranty and coverage The Exide ER850 comes with the **manufacturer's official warranty** against manufacturing defects. Deep discharge from winter lay-up without charging is not covered. ### Care and maintenance Protect the terminals with dielectric grease and check the fixing: vibration and swell loosen connections. At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up. ### Shipping, delivery and returns Orders placed **before [[ks:cutoff]]** 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 **[[ks:return_days]] 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. ## Frequently asked questions ### How is the Exide ER850 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 (βˆ’) 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 β€” match the polarity shown on the product sheet; 6) connect the positive (+) first, then the negative (βˆ’). 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 ER850 battery last? Expected lifespan of the Exide ER850 is 4 to 7 years in regular use (depends on technology and climate). 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 ER850 battery? Dimensions (length Γ— width Γ— height) are 513Γ—223Γ—223 mm β€” also written as 513x223x223 mm β€” 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. ### Does this 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 β€” we reply during business hours (Mon–Fri 10:00–13:30 and 16:40–18:00 (Spanish time, CET)). The ER850 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Exide ER850? 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 β€” 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. ## Equivalent batteries - [EXIDE ET1300](https://baterias.com/gb/battery-exide-et1300-12v-180ah-900a) - [EXIDE EN1100](https://baterias.com/gb/battery-exide-en1100-12v-180ah-1000a) - [VARTA M18](https://baterias.com/gb/battery-varta-m18-12v-180ah-1000a) - [VARTA M12](https://baterias.com/gb/battery-varta-m12-12v-180ah-1400a) - [VARTA B90](https://baterias.com/gb/battery-varta-b90-efb-12v-190ah-1050a) - [TUDOR TX1803](https://baterias.com/gb/battery-tudor-tx1803-180ah-1000a) - [TUDOR TF1853](https://baterias.com/gb/battery-tudor-tf1853-185ah-1150a) - [TUDOR TE1853](https://baterias.com/gb/battery-tudor-te1853-185ah-1100a) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team β€” over 25 years of experience validating automotive batteries. β†’ https://baterias.com/gb/technical-team --- *baterias.com β€” Automotive batteries Β· 2026-10-05*