# Marine battery Exide EZ850 12V 100Ah 900A EFB ![Marine battery Exide EZ850 12V 100Ah 900A EFB](https://baterias.com/5802-home_default/battery-exide-ez850-12v-100ah-850wh-900a.jpg) > Exide EZ850 marine battery 12V 100Ah 900A EFB. Marina & Leisure Dual EFB range. Dimensions 353×175×190 mm, + terminal on the right. Cranking and house duties. **Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [EXIDE](https://baterias.com/gb/exide) - **Canonical URL**: https://baterias.com/gb/battery-exide-ez850-12v-100ah-850wh-900a - **Language**: en-GB - **Brand**: EXIDE - **Reference**: BCOM-EXIDE-EZ850 - **EAN**: 3661024037495 - **MPN**: EZ850 - **Price**: 146,20 € - **Stock**: Out of stock ## Technical specifications | Feature | Value | |---|---| | Brand | EXIDE | | Reference | EZ850 | | Model | EXIDE Dual EFB | | Voltaje | 12 V | | Largo | 353 mm | | Ancho | 175 mm | | Alto | 190 mm | | Peso | 25.5 kg | | Tecnología | EFB | | EAN | 3661024037495 | | Scheme | Positive terminal on the right | | Terminal | EN taper post | | Subjection | B13 | | Arranque en frío CCA EN | 900 A | | Capacidad C20 (Ah) | 100 Ah (c20) | | Box Type | L05 | | Energía (Wh) | 850 Wh | ## Quick description **Exide EZ850 12V 100Ah 900A** 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 🔌 Voltage 12 V ⚡ Capacity 100 Ah C20 🔋 Cold cranking 900 A EN-1 📏 Dimensions 353×175×190 mm ⚙️ Technology EFB 🧭 Polarity Positivo a la derecha ⚖️ Weight 25,5 kg 🏷️ Model EXIDE Marina & Leisure Dual EFB ## Description ## Battery Exide EZ850 100Ah 850Wh 900A 12V The Battery EXIDE EZ850 100Ah 900A 850Wh 12V Dual EFB belongs to the Dual EFB Batteries range of Exide This range of batteries is designed for a higher energy supply, with outstanding performance both in start and cycling, offering excellent acceptance of corrosion load and resistance Exide dual dual batteries are batteries with ca/ca orbital plate and VRLA ventilation ### Ideal for: - Small outboard - Great embarkation - Any type of recreational vehicle ### Battery advantages and characteristics EXIDE EZ850 100Ah 900A 850Wh 12V - 50% savings in recharge time - Low self -devarga, which makes it ideal for long periods of inactivity - Free of mantenimient - Can be installed in cabin - High resistance to vibrations and inclination - Suitable for side assembly ### How to find the right battery for your vehicle? In recent years, there has been an increase of almost 300% in the energy needs of vehicles.To select the appropriate battery, it is essential to select the most appropriate battery technology to use needs.Or if it requires a battery for motor start (START), for double (dual) feeding or for equipment feed (equipment). The wide range of exide batteries offers a complete and varied catalog to meet the electrical demands of any vehicle or device. From small and simple gasoline engines to large and robust industrial engines, exide batteries guarantee a reliable and safe start. If you do not find the battery you need or have doubts about which battery, do not hesitate to contact us. ### Why choose an exide battery? Exide is a global leading brand in the manufacture and marketing of batteries, with the "manufactured in Europe" seal represents the latest technology and the most demanding quality standard, both for the replacement market and for the first team. ### Know more about the exide brand Exide manufactures high performance batteries for all types of vehicles and machinery.Their batteries are designed to cover and respond to the maximum demands for all types of applications. They use more advanced components and materials being recognized for their viability and durability because it is one of the world's largest producers and recycling of the world's lead-acid batteries. The main vehicle manufacturers trust exide as a provider of first equipment as the company develops and manufactures state -of -the -art solutions for both energy storage, industrial applications and automocyon applications. If you want additional information about Battery Exide EZ850, you can download the product's technical sheet at the following link: [ Download technical sheet Exide EZ850 100Ah 850Wh 900A 12V](/fichastecnicas/datasheet-battery-exide-ez850-100ah-850wh-900a-12v.pdf) ## Frequently asked questions ### Is the EZ850 model EFB? Which boats need it? Yes. The EZ850 is an EFB (Enhanced Flooded Battery): flooded lead-acid reinforced with plate additives. Withstands more cycles than a conventional but fewer than an AGM. Fitted to boats with basic Start-Stop (no regenerative braking). More affordable than an equivalent AGM, lifespan 4-6 years. ### How do I check that the Exide EZ850 battery fits my vehicle? Three ways: 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 for the EZ850; 3) if you cannot find your model, message us on WhatsApp with brand, model, engine and year — we reply during business hours (Mon–Fri 9:00–18:00 CET). ### How do I fit the EZ850 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 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 (−) 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. ### How many years of warranty does the EZ850 model cover? This battery includes 1 year of official manufacturer warranty against manufacturing defects. Coverage includes cell breakdowns, internal short-circuits and abnormal capacity decreases. Wear from misuse (prolonged overcharging, wrong charger or faulty alternator) is not covered. On confirmed defect after technical inspection, we replace the EZ850 model at no cost. ### How long does Exide EZ850 delivery take? In mainland Spain and Portugal it arrives in 24 h if you order before 17:00 and the battery is in stock — it leaves the same day and arrives the next business day. Afternoon or weekend orders ship the next business day. For Balearics, Canaries and other EU destinations, allow 2-5 days. Shipping cost is calculated in the cart based on destination and service (standard, express, cash on delivery). Tracking number is sent by email + SMS as soon as the parcel ships. ### How do I return the EZ850 model if it doesn't fit? Yes. You have 14 days from delivery to return it. In mainland Spain and Portugal returns are FREE — we cover the return shipping cost via prepaid label. In other EU countries the return shipping cost is the customer's. It must arrive in its original packaging with no signs of installation. If it was defective, the warranty covers replacement even after the 14-day period. ### How much does the Exide EZ850 battery cost? The current price at baterias.com is 146,20 € (VAT included; 120,83 € excl. VAT), updated every 24 hours. The applicable VAT may vary with the destination country and is confirmed in the cart. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). ### Where can I buy the Exide EZ850 battery? At baterias.com — authorised distributor with real stock, 24h delivery in mainland Spain and Portugal if you order before 17:00, and full manufacturer warranty. Shipping cost is calculated in the cart based on destination and chosen service (standard, express, cash on delivery). Secure payment by card, Bizum, PayPal or bank transfer. If you choose at-home installation, our technician will take the used battery and dispose of it through an authorised collection point. ### How long does the Exide EZ850 battery last? Expected lifespan of the Exide EZ850 is 4 to 6 years in basic Start-Stop boat use. 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 EZ850 model? Dimensions (length × width × height) are 353×175×190 mm — also written as 353x175x190 mm and correspond to the European L5 case size — 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. ### How much does the Exide EZ850 battery weigh? It weighs 25,5 kg. Most of the weight is lead. If you plan to fit it yourself, use gloves and a carrying strap (AGM batteries are slightly heavier than conventional due to the absorbent glass-mat fibre). ### How many Ah and CCA does this battery have? Nominal capacity 100 Ah[?cca: and [cold-cranking amps 900 A]] at 12 V. Ah measure the total energy available (autonomy); CCA (also written A in cold or EN under the European standard) measure the instantaneous power to crank the starter motor. A battery with more CCA starts better in winter; one with more Ah keeps accessories on for longer. ### Is the EZ850 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 9:00–18:00 CET). The EZ850 typically fits a wide range of European vehicles thanks to its standard DIN case format. ### Which batteries are equivalent to the Exide EZ850? 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. ### Is the EZ850 model better than its equivalents from other brands? This battery and its equivalents from Bosch, Tudor or Exide are technically comparable: same dimensions, same voltage and same capacity. The differences are warranty (Varta and Bosch: 2 years; Tudor and Exide: 2 years on the equivalent line), manufacturing plant (Varta and Bosch share origin in the Clarios Group; Tudor and Exide belong to Exide Technologies) and price. For private use any of these brands will give 4-6 years of life. Compare them in the "Equivalents" section. ### What reviews does the EZ850 model have? The product rating, when available, is shown on the product page next to the stars. You can also check our public Trustpilot profile at shop level (4.5/5 from 11,393+ verified reviews). Most-praised points: reliable cold start, lifespan above 5 years and fast delivery; most common complaints mention BMS-equipped boats that need OBD registration after fitting. ## Equivalent batteries - [EXIDE ET650](https://baterias.com/gb/battery-exide-et650-12v-100ah-800a) ## Technical team (editorial authorship) The FAQs, guides and comparisons on this site are reviewed by the baterias.com technical team — over 25 years of experience validating automotive batteries. → https://baterias.com/gb/technical-team --- *baterias.com — Automotive batteries · 2026-08-31*