Name: AUTOOL Stable Power Supply Inverter for ECU Programming
Brand: AUTOOL
SKU: MMT892/MMT234-2/MMT831/MMT831-1/MMT453-1/MMT238
Availability: InStock

The AUTOOL voltage stabilizer is a multifunctional power supply and battery charger designed for ECU programming, automotive diagnostics, and intelligent battery maintenance. With precise voltage control, multiple charging modes, and wide battery compatibility, it ensures safe, efficient, and reliable operation for both professional workshops and car owners. Built-in multilingual support and nine layers of safety protection.

Working Principle

An engine ECU programming power supply is an adjustable power source based on power electronics and control circuit technology, capable of providing precise and stable voltage and current output. Its working principle includes converting the input power into DC through rectification and filtering, then regulating the power (such as via switching or linear regulation) to achieve the target output voltage and current. A feedback system continuously monitors and adjusts the output in real time to ensure stability. The control modes support both local operation (buttons/knobs) and remote communication (USB, RS232, etc.). It also features protection functions such as over-voltage, over-current, and over-temperature protection. With characteristics like high precision, wide output range, and high efficiency, it is widely used in scenarios such as power inverter for car, automotive ECU programming, showroom applications, and production testing.

AUTOOL Voltage Stabilizer ECU Programming Comparison: Which One Fits You Best?

How to Choose EM Series Power Inverter for Car?

AUTOOL EM355 vs EM365 power inverter comparison

The EM365 supports exhibition mode, while the EM355 does not
The EM365 comes with a 3-meter pure copper cable, compared to 2 meters on the EM355
The EM365 supports a Starting Current/Voltage of 400A/12V, which the EM355 does not
The EM365 has a programming power supply output of 150A, while the EM355 is 120A
The EM365 has a rated input power of 1500W, compared to 1200W for the EM355.

AUTOOL EM365 vs EM385 power inverter comparison

The EM385 features a 4.3-inch touch screen, while the EM365 has a non-touch 2.8-inch screen;
The EM385 supports Lithium Iron Phosphate (LiFePO₄) and Nickel Cobalt Manganese (NCM) lithium batteries, which the EM365 does not;
The EM385 has a Programming Power Supply voltage range of 9–16V, compared to 10.8–16V for the EM365;
The EM385 supports lead-acid battery charging at 40A/12V, while the EM365 supports 20A/12V;
The EM385 supports lithium battery charging current/voltage, which the EM365 does not;
The EM385 also supports adjustable power supply current and voltage, unlike the EM365.

I need to use it on lithium batteries

We recommend the AUTOOL EM385 Voltage Stabilizer, our most advanced model, which supports both Lithium Iron Phosphate (LiFePO₄) and Nickel Cobalt Manganese (NCM) lithium batteries.
Please note that the EM365 and EM355 models are not compatible with lithium batteries.

I need to use it adjust the power supply current and voltage

To have adjustable power supply current and voltage, please choose the EM385. The adjustable ranges are:
20A / 3.0–8.9V
100A / 9.0–16.0V

⚠️ EFB Battery Usage Instructions

EFB (Enhanced Flooded Battery) contains liquid electrolyte that is prone to boiling, and overheating during charging may cause fire or explosion. For safety reasons, the In-car Charging mode does not include an option for EFB batteries.
If your battery is an EFB type,please remove it from the vehicle and select the External Charging mode for charging.

🔔 Warm Tips

When turned on, the fan runs for 2 minutes then stops—this is a normal self-test. The operating temperature of the display is -20°C to 70°C.
Avoid water, liquids, or flammable cleaning agents entering the equipment.
If the battery has been deeply discharged for an extended period (e.g., due to sulfuric acid buildup), the repair mode can be used to recharge it. This activates the sulfuric acid density to its maximum, addressing sulfur layer degradation.
Repair mode may damage vehicle electronics. Always remove the battery from the vehicle before using repair mode. Successful repair depends on the degree of vulcanization in the battery.
Use repair mode carefully, as it may cause fluid loss or drying inside the battery.

AUTOOL EM385 Inverter Programmed Power Functions

Programmable Power Supply Mode: The voltage range is adjustable from 9-16V, providing a stable power source for accurate ECU programming and decoding. It offers two voltage regulation modes: adjustable and fixed.
Multi-stage Smart Charging Mode: Pulse charging in the early stage, fast charging in the middle, and trickle charging in the late stage to prevent overcharging and ensure safety.
Adjustable Charging Power Supply: The AUTOOL EM385 ECU programming adapts to the charging needs of various devices and provides reliable testing for various electrical accessories by flexibly adjusting the output voltage and current.
Compatible Battery Types: Not only supports traditional lead-acid batteries, GEL Battery, EFB Battery, and AGM flat plate battery but also specially optimized design to support lithium Iron phosphate batteries and nickel cobalt manganese lithium battery
Battery Restoration Mode: Utilizing advanced pulse repair technology, this device quickly restores battery performance by addressing issues such as aging batteries that fail to charge, severe power loss, and prolonged vehicle inactivity, ensuring optimal battery condition.
Forced Start Mode: Delivers a high 400A starting current, effortlessly jump-starting vehicles with engines up to 3.0L, ensuring reliable performance in critical situations.
Vehicle Display Mode: It provides an uninterrupted power supply with automatic restart during outages, therefore, ensuring stable support for vehicle demonstrations and battery replacements in showrooms.
Nine Safety Protections: Intelligent alarm prompts to fully protect the safety of equipment and vehicles during the charging process.
Five Language Options: Easily switch between English, French, German, Spanish, and Russian to meet the needs of customers from different countries.
3-Year Warranty: For damage caused by non-human factors, we promise to reissue parts free of charge within 3 years.