# CYCLON Battery 4V Monoblocs

> Cyclon Battery 4V Monoblocs, 2 pure lead AGM cells in series. 5-25 Ah. Industrial and avionics. Models 0809-0010 to 0859-0010. 24h delivery.

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- **Language**: en-GB

## Description

**Cyclon Battery 4V Monoblocs**: a 4-volt monobloc (2 spiral-wound pure lead cells connected in series) using the same cylindrical AGM technology as the Single Cell, built into one compact block. Range from 5 to 25 Ah.
Used in industrial and avionics applications that need a compact 4V power source with high discharge capability and good vibration resistance, without having to wire loose cells together, which speeds up installation and reduces the risk of wiring mistakes on site.

## Cyclon 4V Monoblocs: two cells in a single block

The 4V monobloc integrates 2 spiral-wound pure lead Cyclon cells connected internally in series, delivering a nominal 4V in a single case. It keeps the low internal resistance and high momentary discharge capacity of Cyclon technology, with the mounting convenience of a compact block instead of loose cells.

### Common models and uses

- **0809-0010** (5 Ah) — industrial instrumentation and control equipment.
- **0809-0012** (8 Ah) — avionics systems and critical backup.
- **0859-0010** (25 Ah) — industrial applications needing more autonomy.

### How to choose between 2V, 4V and 6V

If your equipment runs on 2V, the [Single Cell](/gb/cyclon-battery-2v-single-cell) is enough; if you need 6V, check the [6V monobloc](/gb/cyclon-battery-6v-monoblocs). Use our [battery comparator](/gb/comparator) to compare capacities and pick the exact reference.

## Frequently asked questions about the Cyclon 4V monobloc

### **What's the difference between the 4V monobloc and two loose 2V cells?**

Electrically it's equivalent to 2 cells in series, but the monobloc integrates them in a single case, simplifying mounting and wiring.

### **Is it compatible with avionics applications?**

Yes, that's one of its typical applications thanks to its vibration tolerance and compact, sealed construction.

### **How long does a Cyclon 4V monobloc last in industrial use?**

Sharing the Single Cell's spiral-wound pure lead technology, it's built for deep discharge cycles and continuous float duty over years of service.

Catalogue curated by our technical team. **11,154 Trustpilot reviews · 4.5/5**. 24h mainland delivery, free 14-day returns.

## 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 · 2026-08-16*