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CTEK
CTEK MXTS 40 12V/24V 40A Battery Charger and Support Unit | Dual Voltage Workshop Power for India
40A dual-voltage workshop charger and power supply. Supports 12V and 24V. Essential for ECU programming.
voltage
12V / 24V
current
40A
battery range
All sizes
battery types
WET, AGM, GEL, Ca/Ca
function
Charger + Power Supply
warranty
3 years
₹1,18,900
+ 18% GST
Total incl. GST: ₹1,40,302
Free shipping across India
14-day returns
Authorized Distributor
Official dealer since 2014
100% Genuine
Sourced directly from CTEK
Replacement Warranty
Defective unit replaced, not repaired
Direct Support
About This Product
Why the CTEK MXTS 40 12V/24V?
Modern vehicle electronics — ECUs, ADAS systems, air suspension control modules — are sensitive to voltage drops. When a workshop technician reprograms an ECU or performs a software update, the battery must stay above 12.5V for the entire procedure, which can take 45 minutes. If the voltage drops mid-procedure, the ECU can be permanently damaged. The MXTS 40 is not just a charger — it is a power supply unit that maintains stable voltage while work is being performed. At 40A across both 12V and 24V, it handles any passenger or commercial vehicle.
How It Works
The 4-step process explained
1
Power Supply Mode
Delivers stable 13.5V (12V vehicles) or 27V (24V vehicles) regardless of the battery state — keeps electronics safe during diagnostics and programming.
2
Charge Mode
40A rapid charge — charges a flat 45Ah car battery in approximately 1.5 hours.
3
Support Mode
Maintains voltage above threshold while the battery is being replaced — prevents ECU reset and loss of radio codes.
4
Maintenance Mode
Holds battery at peak condition between jobs.
How To Use
Step-by-step instructions
For ECU programming: connect before starting the procedure. Set to Power Supply mode to maintain stable 13.5V throughout.
For battery replacement: connect MXTS 40 to the vehicle before disconnecting the old battery — this maintains power to the ECU.
For rapid charging: standard charging mode at 40A.
For 24V trucks: switch to 24V mode using the selector.
Compatibility
Works with these vehicles
Compatible vehicles — common examples. If your vehicle is not listed, ask Arjun below — it almost certainly still works.
All 12V cars (workshop use)
Power supply during ECU work
12V
All 24V trucks (workshop use)
Power supply during diagnostics
24V
ECU programming / ADAS calibration
Stable power supply essential
12V/24V
Showroom battery maintenance
Multiple cars simultaneously
12V/24V
Don't see your vehicle? Ask Arjun — tell him your make, model and year for a direct answer.
Not suitable for: Home users — the MXS 5.0 or 7.0 is far more appropriate. This is a professional workshop tool.
How It Compares
vs other options
vs Pro 25S: Both have power supply functions. The MXTS 40 covers both 12V and 24V in one unit — important for workshops that service trucks as well as cars. The Pro 25S is 12V only but more compact. vs MXS 10: The MXS 10 is a charger only — no power supply function. For ECU work, the MXTS 40 is the correct tool.
FAQ
Common questions
How is a CTEK charger different from a cheap charger?
A basic charger pushes current until you disconnect it, which can overcharge and damage the battery. CTEK chargers use a multi-step algorithm — they assess battery condition, desulfate if needed, charge at the optimal rate, and switch to maintenance mode automatically. Safe to leave connected indefinitely.
Can I charge an AGM battery with a standard charger?
No — AGM batteries require a specific voltage ceiling and charging profile. A standard charger will overcharge an AGM battery and destroy it. All CTEK chargers with an AGM mode are safe for AGM batteries.
How often should I charge my car battery?
If you drive daily, your alternator keeps the battery charged. But if the car sits unused for more than 2 weeks, connect a charger. In Indian summers, charge and test every 3 months — heat is the primary cause of early battery death.
Is it safe to leave a CTEK charger connected for months?
Yes. CTEK chargers automatically switch to pulse maintenance mode once charging is complete. They deliver tiny pulses to keep the battery at 100% without overcharging. Many customers leave them connected for the entire monsoon/winter storage period.
Is naredi.in an authorized dealer?
Yes. naredi.in is the authorized distributor in India for CTEK, Rislone, OzCharge, Autool and Foxwell. Products are sourced directly from the brands — not grey market imports. Warranty is handled by naredi.in directly in India.
What is the return policy?
14-day returns from the date of delivery, hassle-free. Contact naredi.in via WhatsApp at +91 93112 11157 to initiate a return.
How long does shipping take?
Free shipping across India. Metro cities typically 2-3 days, other cities 3-5 days. Tracking is provided once dispatched.
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Ask Arjun
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