---
product_id: 445018854
title: "CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger"
brand: "ctek"
price: "128.77 OMR"
currency: OMR
in_stock: true
url: https://www.desertcart.com.om/products/445018854-ctek-40-331-cs-one-uk-black-and-56-304
store_origin: OM
region: Oman
---

# Adaptive Charging Tech 2.5m Extension Cable Polarity-Free Clamps CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger

**Brand:** ctek
**Price:** 128.77 OMR
**Availability:** ✅ In Stock

## Summary

> 🔋 Charge smarter, not harder—join the future of effortless battery care!

## Quick Answers

- **What is this?** CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger by ctek
- **How much does it cost?** 128.77 OMR with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.om](https://www.desertcart.com.om/products/445018854-ctek-40-331-cs-one-uk-black-and-56-304)

## Best For

- ctek enthusiasts

## Why This Product

- Trusted ctek brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Last:** Durable, flexible cables tested in Sweden for rugged reliability.
- • **Extended Reach:** 2.5m extension cable for hard-to-access or distant batteries.
- • **Smart Battery IQ:** Automatically detects battery type & size for a tailored charge.
- • **Foolproof Polarity:** Clamps auto-detect positive/negative—no risk, no guesswork.
- • **Plug & Play Simplicity:** No buttons, no modes—just connect and charge effortlessly.

## Overview

The CTEK 40-331 CS ONE UK charger combines cutting-edge Adaptive Charging Technology with a no-fuss, button-free design that automatically detects battery type and polarity for optimal charging. Paired with the 2.5m Connect Extension cable, it offers extended reach and secure connections, making it perfect for professional-grade vehicle battery maintenance. Durable, smart, and backed by a 5-year warranty, this system is engineered for millennials who demand efficiency and reliability in their automotive tech.

## Description

CTEK 40-331 CS ONE UK,BlackCharging any battery just got a whole lot simpler with the CTEK CS ONE. Its revolutionary APTO (Adaptive Charging) technology does all the thinking for you you don’t even have to worry about which clamp goes where! This is the easiest charger you’ll ever use. Add in dedicated app control, to unlock additional features and you’ve got the most advanced charger available today. Super simple. Super smart. Simply CS ONE. RECOND option to restore and recondition lead-acid batteries. WAKE UP option to revive seemingly dead lithium and lead-acid batteries. 12V SUPPLY to support the battery during service work and retain contact power to the vehicle during battery replacement / removal. ADVANCED SETTINGS to monitor charger voltage & amperage. Can be left safely connected for long periods during maintenance charging. New durable design to make it easy to handle, with unique mounting system on the back for quick connection to CS accessories. 5 year warranty.CTEK 56-304 Connect 2.5M Extension: extend the range of your chargerMake it easier to reach further away or awkward battery locations, by extending the reach of your battery charger. Simply attach the CTEK Connect 2.5M Extension via CTEK’s unique in-built connect system for a secure and safe connection. It’s compatible with CTEK XC 0.8, XS 0.8, MXS 3.8, MXS 5.0, MXS 5.0 Polar, MXS 5.0 Test & Charge, CT5 Time to Go, CT5 Start-Stop, CT5 Powersport, MXS 7.0 & MXS 10 chargers. Other practical accessories, compatible with these chargers are available, including a Protect Bumper, Indicator & Cig Plug Connector. CTEK is the pioneering and trusted manufacturer of innovative battery management systems and supplier of chargers to the world's most recognised car manufacturers.

## Features

- Product 1: Super Smart and Super Simple - no buttons to press or modes to select – simply connect to any 12V lead-acid or lithium (LiFePO4) battery and leave it to do its work
- Product 1: Adaptive Charging Technology (APTOTM) - automatically works out what type and size of battery you’ve got and what it needs, then delivers a customised charging programme with the most appropriate charge
- Product 1: Polarity Free Clamps - just put one clamp on each charging point and the CS ONE will automatically work out which is the positive and which is the negative terminal
- Product 1: Bad cell detection - the CS ONE can tell if your battery can’t be charged – and will notify you
- Product 2: Easier connection: 2.5 metre cable, for connection to further away or hard to reach batteries
- Product 2: Tough & durable: hardwearing, flexible cables, designed and tested in Sweden
- Product 2: Secure: snug and safe connection via CTEK’s unique in-built connect system
- Product 2: Compatible: the Connect 2.5M Extension is designed for with CTEK chargers up to 10A output.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Manufacturer | CTEK |
| Brand | CTEK |
| Special Features | Charging Indicator, Short Circuit Protection |

## Product Details

- **Brand:** CTEK
- **Output voltage:** 12 Volts
- **Specification met:** cs
- **Input voltage:** 12 Volts
- **Current rating:** 10 Amps

## Images

![CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger - Image 1](https://m.media-amazon.com/images/I/51d1hju6m9L.jpg)
![CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger - Image 2](https://m.media-amazon.com/images/I/71iYGVWXkGL.jpg)
![CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger - Image 3](https://m.media-amazon.com/images/I/91inoXVjOLL.jpg)
![CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger - Image 4](https://m.media-amazon.com/images/I/81lJ8zSXuAL.jpg)
![CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger - Image 5](https://m.media-amazon.com/images/I/81m5+FkisbL.jpg)

## Frequently Bought Together

- CTEK 40-331 CS ONE UK,Black & 56-304 Connect 2.5M Extension: extend the range of your charger
- CTEK 56 - 304 Connect 2.5M Extension extend the range of your charger
- CTEK 56-382 Indicator eyelet M8: practical LED indicator for immediate indication of battery charge levels , Red/black

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**Shop now:** [https://www.desertcart.com.om/products/445018854-ctek-40-331-cs-one-uk-black-and-56-304](https://www.desertcart.com.om/products/445018854-ctek-40-331-cs-one-uk-black-and-56-304)

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*Product available on Desertcart Oman*
*Store origin: OM*
*Last updated: 2026-03-12*