9.8Our score 4 photos【High-Current Programming Mode】Delivers a stable 10.8V–16.0V adjustable output with a 120A max current (sustained for 3 minutes), ideal for
Ranked #99 in Automotive · 4 things we like
Quick answer The AUTOOL Flash Reprogramming Power Supply 120A scores 9.8/10 with us. Amazon owners rate it 4.9 out of 5 across 16 reviews, above the 4.4 average of the 233 products we track in Automotive. It was listed at $399.99 on Amazon when we last checked in September 2026.
【High-Current Programming Mode】Delivers a stable 10.8V–16.0V adjustable output with a 120A max current (sustained for 3 minutes), ideal for ECU programming and vehicle diagnostics without voltage drops. Provides stable voltage for ECU reprogramming, module coding, and ADAS calibrations. 【Fast Charging & Smart Charge】20A/12V lead-acid battery charging, 40A for in-vehicle battery charging, and 20A for external battery charging.
Multi-stage intelligent charging mode, early charging using pulse charging. Mid-term charging quickly switches to high power charging. Later charging automatically switches to trickle charging mode and stops charging when fully charged to ensure safety and prevent overcharging.
【Battery Repair】Revives deeply discharged or sulfated batteries, extending battery life and saving replacement costs. Supports multiple battery types: standard lead-acid batteries, AGM batter
Do Best Deal is a participant in the Amazon Services LLC Associates Program. As an Amazon Associate we earn from qualifying purchases. If you buy through links on this site we may earn a commission, at no extra cost to you. Learn more.
| Output Voltage | 12 volts |
|---|---|
| Input Voltage | 110 volts |
| Current Rating | 20 A |
| Amperage | 120 A |
| Connector Type Used on Cable | Alligator Clips |
| Number of Ports | 2 |
| Item Dimensions D x W x H | 16"D x 12"W x 7"H |
| Item Weight | 21 pounds |
| Brand | AUTOOL |
|---|---|
| Mfr Part Number | EM355 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Item Highlight | Battery Maintainer for Programming with Battery Repair Mode Adjustable Power Supply, 6.5ft Cables, HD Display |
| Unit Count | 1 Count |
| Model Number | EM355 |
| Warranty Description | 3 year manufacturer |
Yes, it is one of the stronger picks in its group. We score the AUTOOL Flash Reprogramming Power Supply 120A 9.8 out of 10. Amazon owners rate it 4.9 out of 5 across 16 reviews, above the 4.4 average of the 233 products we track in Automotive. The review count is still small, so treat the rating as an early signal.
It was listed at $399.99 on Amazon when we last checked in September 2026. Amazon prices change daily, so use the price button on this page to see the current figure.
Amazon lists 3 options. Model: EM 385, EM365, EM355. Pick an option on this page and the button opens exactly that model.
Similar, well-rated products in our catalog: acetek 1800A Peak Car Jump Starter (8.8/10, 4.4 stars from 80 owners); VANXIPOW M1 7000A Car Battery Jump Starter (8.2/10, 4.5 stars from 182 owners); Garvee 2-Pack ST205/75D15 Trailer Tires and15" (9.6/10, 4.8 stars from 41 owners).
acetek 1800A Peak Car Jump StarterVANXIPOW M1 7000A Car Battery Jump StarterGarvee 2-Pack ST205/75D15 Trailer Tires and15"
Breakdown from the 8 most helpful reviews we imported.
Worked flawlessly, super easy controls, and operation. Used it to keep constant power on my 2015 suburban while I reprogrammed the TCM. The unit is physically large but it the leads are long enough to reach the battery while unit is on the ground. Would highly recommend!
Bought 5 of these for vehicle programming, all fantastic. Support’s easy to work with too — had a guy walk me through fixing the programming on two of my units, knew his stuff. Highly recommend if you do a lot of vehicle programming.
So far so good, it was dropped from bench hight and still working like a champ. Use it everyday.
I replaced the transmission on my Silverado . I purchased this unit because I needed a stable voltage to the battery to program the reman transmission . I set the voltage to13.5 volts and it worked as intended providing the necessary stable voltage recommended by the GM to successfully reprogram the transmission control module(TCM) . I would recommend if you are a DIYer and need to reprogram a module on any vehicle and you need stable voltage source to complete the job .
This thing is big. A lot bigger than I thought. But it does work. I've been using it for a while now. I work at a dealership so I am constantly doing reprogramming. My only issue is storage. Just wish it was a little smaller.
Excellent product, works great for my 2023 BMW M8 while scanning.
Worked perfectly to support recovery of my F-Pace's instrument cluster module and saved me $4k from not having to push through with the dealer's proposed part replacement.
Excellent product
Customer reviews are shown as published on Amazon and are not written by Do Best Deal.
Alternatives to the AUTOOL Flash Reprogramming Power Supply 120A
9.4Adaptive Smart Charging: Our battery maintainer adapts to the needs of your 12V battery, ensuring optimal charging and extending battery lif
8.8MEET THE GENIUS1 — Similar to our G750, just better. It's 35% smaller and delivers over 35% more power. It's the all-in-one charging solutio
8.8Efficient, Energy-Saving, and Fast Charging: The TowerTop 12v battery charger offers 4 adjustable current settings (2A/10A/25A/AUTO) to meet
8.6【MORE THAN A JUMP STARTER】jump starter is derived from the upgraded design of 2026 which will lead the market trend in the future. This batt
8.4HELPS STOP ROAD REBOOTS — Unlike basic cables that pass vehicle voltage straight through, this 105W boost adapter helps keep Starlink Mini p
8.8Compact & Powerful:Dumfume 12V 300Ah (314Ah) LiFePO4 Deep Cycle Lithium Battery Weighs Only 57 lbs,1/3 The Weight Of Lead-Acid Battery,energ
9.4【Things you may need】: This roadside assistance packages is a perfect gift.Contain the necessary roadside kits, snow shovel, flashing lights
8.8With the super 1800Amp peak and 20000mah capacity, it is designed for 12V vehicles with up to 6.0L gas and 6.0L diesel engines like cars, SU
8.5Includes four seat cushion shoulder pads to outfit your vehicle completely.
9.410+ Years of Extreme Protection: Advanced ceramic coating for cars with 20H hardness – the toughest shield against UV rays, acid rain, and o
9.0【Auto Repair】This product is a comprehensive 22-piece automotive tool kit designed for daily vehicle maintenance.
9.8This BBQ and Grill station comes with a bracket to mount right onto the side of your motorhome, RV, or trailer so you can have a cookout whe
7.8Material Upgrade: The new windshield sunshade for 2026 provides more sun protection and shade. We abandoned the old-fashioned titanium silve
9.6PERFECT FIT FOR Ram 2500/3500 Crew Cab 2019-2024 2025 2026: Edge-to-edge custom fit design via laser 3D scanning for a tight fit between the