# Marine battery Exide EV640 12.8V 50Ah LifePo4 BT

![Marine battery Exide EV640 12.8V 50Ah LifePo4 BT](https://baterias.com/1907-home_default/battery-exide-ev640-128v-50ah-640wh.jpg)

> Exide EV640 marine battery 12.8V 50Ah LifePo4 BT. MARINE AND LEISURE LI-Ion range. Dimensions 308×168×211 mm, + terminal on the left.

**Category:** [Boat Batteries](https://baterias.com/gb/boat-batteries) → [EXIDE](https://baterias.com/gb/exide)

- **Canonical URL**: https://baterias.com/gb/battery-exide-ev640-128v-50ah-640wh
- **Language**: en-GB
- **Brand**: EXIDE
- **Reference**: BCOM-EXIDE-EV640
- **EAN**: 3661024037976
- **MPN**: EV640S
- **Price**: 930,60 €
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | EXIDE |
| Reference | EV640 |
| Model | EXIDE MARINE AND LEISURE LI-Ion |
| Voltage (V) | 12.8 V |
| Largo | 307 cm |
| Ancho | 170 cm |
| Alto | 216 cm |
| Peso | 8.5 kg |
| Tecnología | LifePo4 BT |
| Capacity (C20) | 50 Ah (c20) |
| Case type | D31 |
| Energy (Wh) | 640 Wh |

## Quick description

**Exide EV640 12V 50Ah** is a LiFePO4 lithium service battery for boats, designed to power onboard loads (fridge, fishfinder, GPS, lights, inverter) through deep daily discharges. It is not a starting battery: it replaces the lead-acid service bank at around 60 % less weight.

### Why this lithium marine battery?

- **Deep-cycle service bank** daily discharges to 80 % with no capacity loss
- **60 % less weight on board** the same energy as lead-acid in far less space
- **Built-in BMS, maintenance free** protects against overcharge, over-discharge and short circuit

🔌 Voltage
12 V

⚡ Capacity
50 Ah C20

📏 Dimensions
308×168×211 mm

⚙️ Technology
LifePo4 BT

🧭 Polarity
Positive on the left

⚖️ Weight
8,5 kg

🏷️ Model
EXIDE MARINE AND LEISURE LI-Ion

## Description

## Marine battery Exide EV640 MARINE AND LEISURE LI-Ion 50Ah 12.8V

12.8*V* Voltage
50*Ah* Capacity
8.50*kg* Weight

With **50 Ah** at **12.8 V**, the **Exide EV640** from the **MARINE AND LEISURE LI-Ion** range is built for motor and sailing boats, both for engine starting and onboard services. Measuring 307 × 170 × 216 mm, it is the direct replacement for boats fitted from the factory with a 50 Ah battery of this format.
- Built-in BMS protecting the battery and the vehicle.
- Ready for starting outboard and inboard engines.
- Sealed: no spills or gases in the locker.
- Resistant to humidity and salt air.

### What the Exide EV640 is for

The Exide EV640 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 8.50 kg.

### Dimensions, polarity and mounting

The Exide EV640 is made in the 307 × 170 × 216 mm format and weighs 8.50 kg. 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 EV640: MARINE AND LEISURE LI-Ion range and LiFePO4 lithium technology

The **MARINE AND LEISURE LI-Ion** is the Exide range the EV640 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.
LiFePO4 chemistry is the safest of the lithium batteries: thermally stable, cobalt-free and good for thousands of cycles, protected by its electronic management system.

### Why choose Exide batteries

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. At baterias.com we work directly with the manufacturer or its official distributor: real stock, brand-new product and official warranty.

### Manufacturer's warranty

The Exide EV640 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

Store the battery at 50-70% charge if it will be unused for months. At the end of the season, charge the battery fully and, if possible, keep it on a charger over the winter lay-up.

### When you get it and how to return it

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 do I fit the EV640S 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 does this battery last?

Expected lifespan of the Exide EV640S is 10 to 15 years, equivalent to 3,000-5,000 cycles at 80% DoD. 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 308×168×211 mm — also written as 308x168x211 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 EV640S 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 EV640S typically fits a wide range of European vehicles thanks to its standard DIN case format.

### What are the equivalents of the EV640S model?

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.


## 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

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*baterias.com — Automotive batteries · 2026-10-02*