# Equipment battery Cyclon 4V-D 4V 2.5Ah AGM

![Equipment battery Cyclon 4V-D 4V 2.5Ah AGM](https://baterias.com/1934-home_default/battery-cyclon-4v-d-4v-25ah.jpg)

> Cyclon 4V-D equipment battery 4V 2.5Ah AGM. Battery 4V Monoblocs range. Reliable power for electronic equipment, alarms and portable devices.

**Category:** [Batteries for telecommunications systems](https://baterias.com/gb/batteries-for-telecommunications-systems) → [CYCLON](https://baterias.com/gb/cyclon)

- **Canonical URL**: https://baterias.com/gb/battery-cyclon-4v-d-4v-25ah
- **Language**: en-GB
- **Brand**: CYCLON
- **Reference**: BCOM-CYCLON-4V-D
- **MPN**: 4V-D
- **Stock**: Out of stock

## Technical specifications

| Feature | Value |
|---|---|
| Brand | Cyclon |
| Reference | 4 V-D |
| Model | CYCLON Battery 4 V Monoblocs |
| Voltage (V) | 4 V |
| Alto | 4.6 cm |
| Peso | 0.36 kg |
| Tecnología | AGM |
| Capacity (C20) | 2.5 |
| Capacity (C10) | 2.5 Ah (c10) |
| Diameter | 7.95 cm |

## Quick description

**Cyclon 4V-D 4V 2Ah** is a sealed battery for electronic equipment and devices: stable voltage, maintenance-free and mountable in any position.

### Why this equipment battery?

- **Instant response** when the mains drop, no voltage dip
- **Long life under 24/7 charge** optimised for permanent service
- **Compatible with your system** existing UPS units and alarm control panels

🔌 Voltage
4 V

⚡ Capacity
2 Ah C10

⚙️ Technology
AGM

⚖️ Weight
0,36 kg

🏷️ Model
CYCLON Battery 4V Monoblocs

## Description

## Stationary battery Cyclon 4V-D Battery 4V Monoblocs 2.5Ah 4V

4*V* Voltage
2.5*Ah* Capacity
0.36*kg* Weight

Designed for UPS, alarms, telecoms and emergency lighting, the **Cyclon 4V-D** from the **Battery 4V Monoblocs** range offers **2.5 Ah** with AGM technology on permanent float charge. It replaces the original battery without adaptation in UPS, alarm and emergency systems with a 8 × 8 × 4 mm format: same 2.5 Ah capacity.
- Sealed and gas-free: suitable for cabinets and offices.
- Maintenance-free for its whole service life.
- AGM technology: absorbed electrolyte, no spills, can be mounted at an angle.
- Long float life under permanent charge.

### What the Cyclon 4V-D is for

Designed for UPS, alarms, telecoms and emergency lighting, the Cyclon 4V-D is sealed, gas-free and suitable for technical cabinets and offices. Check that it matches your current battery in dimensions, terminals and hold-down: this reference has a weight of 0.36 kg.

### Will it fit your current battery tray?

It has external dimensions of 8 × 8 × 4 mm and weighs 0.36 kg. 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 Cyclon does differently

Cyclon (EnerSys) makes pure-lead cells with thin plates wound in a spiral: high current, great tolerance to extreme temperatures and a very long life in industrial, military and emergency applications. We guarantee that every Cyclon arrives new, charged and with the manufacturer's full warranty.

### The Cyclon 4V-D: Battery 4V Monoblocs range and AGM technology

Within the Cyclon catalogue, the **Battery 4V Monoblocs** series groups the references designed for this use. The 4V-D is the 2.5 Ah model of that family, with the same performance as its siblings in other sizes.
AGM means the acid is held in a glass mat instead of floating free. That is why the battery can be installed in the cabin without gases, survives more cycles and recovers its charge quickly.

### Usage and maintenance tips

Replace all the batteries in the set at once and avoid environments continuously above 25 °C. Check the float voltage of the UPS or charger: a voltage that is too high shortens the life of a sealed battery.

### Manufacturer's warranty

The Cyclon 4V-D comes with the **manufacturer's official warranty** against manufacturing defects. If it fails through a defect within the warranty period, we replace it at no cost to you.

### 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

### Is the Cyclon 4V-D an AGM battery and what are the benefits of AGM?

Yes. The 4V-D from Cyclon 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 devices with advanced Start-Stop and regenerative braking. Expected lifespan: 5-8 years under normal conditions.

### How do I know if the 4V-D model fits my device?

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 4V-D; 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)).

### How is the Cyclon 4V-D battery installed in the vehicle?

In most devices 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 devices 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 4V-D model cover?

We provide 1 year of official manufacturer warranty against manufacturing defects. It applies to defects such as damaged cells, internal short-circuits or abnormal capacity loss. Damage from misuse is excluded: prolonged overcharging, unsuitable chargers or a faulty alternator. Once the defect is verified by technical inspection, we replace the 4V-D at no cost.

### How long does Cyclon 4V-D delivery take?

In mainland Spain and Portugal it arrives in 24 h if you order before 6:00 pm 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.

### Can I return the Cyclon 4V-D battery if it doesn't fit or doesn't work?

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.

### Where can I buy this battery with full warranty?

At baterias.com — authorised distributor with real stock, Express 24h delivery in mainland Spain and Portugal if you order before 6:00 pm, 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.

### What is the service life of the 4V-D model?

Expected lifespan of the Cyclon 4V-D is 5 to 8 years in mild-climate device 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 measurements of the 4V-D model?

Dimensions (length × width × height) are 8×8×5 mm — also written as 8x8x5 mm — following the European DIN standard. Always measure the space in your device before buying: even one extra millimetre can prevent the hold-down clamp from closing. The height shown includes the terminals.

### How much does the Cyclon 4V-D battery weigh?

It weighs 0,4 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).

### What are the equivalents of the 4V-D 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 devices. See the "Equivalents" section to view recommended options at the same performance level.

### Is this battery a better choice than another equivalent?

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 do users say about the Cyclon 4V-D battery?

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 11,700+ verified reviews). Most-praised points: reliable cold start, lifespan above 5 years and fast delivery; most common complaints mention BMS-equipped devices that need OBD registration after fitting.


## 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 · 2026-09-27*