Description
TOPDON Tornado 4000 (T4000) Smart Battery Charger & Maintainer
Product Overview
The TOPDON Tornado 4000 (T4000) is an all-in-one smart battery charger, maintainer, trickle charger, battery desulfator, and DC power supply engineered for 6V and 12V batteries. Combining multi-step micro processing technology with rugged weather resistance, it safely diagnoses, repairs, and optimizes battery performance across automotive, marine, and motorsport applications.
Key Features & Specifications
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Current & Voltage Output: Delivers a maximum charging current of 4A across an input voltage range of 100–240V AC.
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Battery Compatibility: Supports 6V and 12V lead-acid batteries (Wet, Gel, MF, EFB, AGM, CAL) as well as 12V lithium-ion batteries, with applicable capacities ranging from 5Ah up to 120Ah (and maintenance support up to 150Ah).
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5 Dedicated Charging Modes: Features selectable modes including 12V NORM, 12V LI (Lithium), 12V REP (Repair/Desulfation), 12V SUP (Supply), and 6V NORM.
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9-Step Smart Charging Technology: Utilizes advanced pulse-width modulation and automated diagnostic steps to optimize charging speed, prevent overcharging, and extend battery life.
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Stable Power Supply Mode: Functions as a 13.5V DC / 4A power supply and voltage stabilizer to maintain electrical systems during ECU programming or to power 12V accessories like tire inflators.
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Built-In Desulfation & Repair: Automatically detects sulfation and acid stratification to break down crystal buildup in aging or neglected batteries.
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Climate Compensation: Integrated sensors automatically adjust charging parameters based on ambient temperature to prevent over-charging in warm weather and under-charging in cold weather.
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Durability & Protection: IP65-rated water-resistant and dustproof ABS enclosure built to withstand extreme temperatures down to -4°F (-20°C), complete with protections against reverse polarity, short circuits, overheating, and sparks.
What’s in the Box
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TOPDON Tornado 4000 Smart Battery Charger Unit
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Heavy-Duty Battery Clamps
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SAE to O-Ring Terminal Connectors
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Protective Carrying / Storage Bag
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User Manual & Documentation














