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CTEK
CTEK CS One – 12V Charger for AGM, EFB, GEL & Lithium Batteries
SKU: SKU :40-330
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Description
Description
Product Description
The CTEK CS One is a premium automatic charger and 12V battery charger engineered in Sweden for Indian car owners, workshops, and fleet managers. It safely charges AGM, EFB, GEL, and Lithium batteries across vehicles like Maruti, Tata, Mahindra, and Royal Enfield, built to handle India's voltage fluctuations and monsoon storage conditions reliably.
Features & Benefits
- Adaptive Detection: Auto-identifies all battery chemistries — no manual switching needed, ideal for mixed-fleet workshops.
- Universal Input (100–240V): Handles Indian voltage fluctuations without a stabiliser, protecting your 12v battery and charger investment.
- Bluetooth App Control: Monitor your automotive charger live via the CTEK app on iOS or Android.
- 8-Step Desulphation: Revives batteries discharged during long monsoon storage or extended parking.
- Spark-Proof Safety: Reverse polarity and short-circuit protection — safe in dimly lit Indian garages.
- Start-Stop & Diesel Ready: Supports modern EFB start-stop systems and diesel engine vehicles.
- Genuine Swedish Origin: Authorised CTEK product — not a grey-market duplicate common on unverified platforms.
Detailed Specifications
| Specification | Details |
|---|---|
| Input Voltage | 100–240V AC, 50/60Hz |
| Output Voltage | 12V DC |
| Battery Types | AGM, EFB, GEL, Wet Cell, Lithium (LiFePO4) |
| Charging Programme | 8-step automatic |
| Connectivity | Bluetooth — CTEK App (iOS & Android) |
| Origin | Sweden (CTEK) |
How To Use
- Download the free CTEK app on your Android or iOS device.
- Connect red clamp to positive terminal, black to negative.
- Plug into any standard Indian 230V wall socket.
- Select battery type in the app — charging begins automatically.
What's Included in the Box
- CTEK CS One Charger Unit
- Clamp Cable Set
- User Manual
Comparison: CTEK CS One – 12V Charger for AGM, EFB, GEL & Lithium Batteries vs Generic Alternatives
| Feature | CTEK CS One | Generic Alternatives |
|---|---|---|
| Battery Detection | Fully automatic | Manual selection |
| Voltage Range | 100–240V, fluctuation-safe | Fixed input, risk of damage |
| Authenticity | Authorised, genuine CTEK | Grey-market or counterfeit risk |
| App Monitoring | Bluetooth real-time control | No connectivity |
| Safety | Spark-proof, reverse polarity | Minimal protection |
Understanding the Technology
The CTEK CS One uses adaptive multi-step charging — a process where the charger continuously analyses battery voltage and internal resistance to deliver the precise current needed at each stage. This pulse conditioning technique breaks down lead sulphate crystals that form during deep discharge, a common issue in India after long parking periods or monsoon storage. Unlike basic car battery chargers that apply constant current, CTEK's algorithm prevents overcharging, extending overall battery life significantly across all supported chemistries.
Warranty & Support in India
- Warranty: 2-year warranty against manufacturing defects
- Customer Support: Monday–Saturday, 9 AM–6 PM IST. WhatsApp / Phone: +91 93112 11157 · hello@naredi.in (English & Hindi)
- Returns: 14-day return and exchange policy, COD returns accepted
- Delivery: Free delivery across India, Cash on Delivery available
Frequently Asked Questions
Is this compatible with Indian cars like Maruti and Tata?Yes — the CTEK CS One charges all 12V batteries including those in Maruti, Tata, Mahindra, Honda, and Royal Enfield models supporting AGM, EFB, GEL, and Lithium types.
Will it work safely with India's fluctuating power supply?Absolutely — its 100–240V universal input handles voltage fluctuations common across Indian pin codes without requiring a separate stabiliser.
How do I raise a warranty claim?Contact Naredi support via WhatsApp / Phone: +91 93112 11157 or hello@naredi.in, Monday–Saturday, 9 AM–6 PM IST.
Is Cash on Delivery available?Yes — COD is available with free delivery to all Indian pin codes.
Complete Your Kit
Everything you need for complete vehicle care
- Test before you charge: Battery Testers →
- Diagnose the root cause: OBD Diagnostic Tools →
- Emergency backup: Jump Starters →
- Keep fluids healthy: Performance Additives →
Further Reading
Our guides will help you get the most out of this product.
- CTEK CS One: Why India's Harshest Roads and Hottest Summers Demand a Smarter Battery Charger
- Battery Jump Starter: Why the OzCharge RM 1000 Supercapacitor Unit Is the Smartest Buy for Indian Car Owners
- 12V Battery Charge Time Calculator: How Long to Fully Charge Your Car Battery in India (And Never Overcharge Again)
