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Your cart is empty.The E-Z Red MS4000 is now equipped with a built in charger. A 12 volt, 4.5 amp hour sealed lead acid battery is included inside the unit. The direct wired OBDII connector plugs directly into the vehicles OBDII port. The green LED indicates connection to circuit. The Amber LED indicates when the internal battery is 11.6 volts or lower and requires changing soon. The MS4000 saves all drive-ability codes and settings when disconnecting/changing a vehicle's starter battery. It also protects settings and codes for anti-theft radios, clocks, keyless entry systems, and much more.
Melvin Priester
Reviewed in the United States on May 16, 2025
Good product.
Ron D.
Reviewed in Canada on January 29, 2025
Box was open - unit not working - can’t even return , was of $150.00 - Amazon can’t even give me a refund . Talk about getting ripped off .Wish I could give -5 five stars
Henry Lyon
Reviewed in the United States on January 28, 2025
I used this unit to replace the battery on two of my cars. It worked as advertised and I did not loose any programming and all the features were retained. It is simple and easy to use and the instructions are easy to follow.
Jason Beas
Reviewed in the United States on September 22, 2024
Bought for work. This comes in handy when needing to replace battery in a vehicle such as Honda/Acura
Luke
Reviewed in the United States on June 18, 2024
Simply charge this and then plug it in to save the memory of the vehicle you are putting a battery in. Very basic light comes to tell you it is plugged in correctly, then just flip it on before replacing the battery. Also, if it is getting low will show up yellow which is nice.
Darrell S
Reviewed in the United States on December 28, 2024
I wished I knew about this charger sooner. I did everything as noted when changing the battery in my car. I didn't lose any memory and it worked perfectly.
Jim N
Reviewed in the United States on November 24, 2024
I am almost certain this was a returned item. The box had bulged in areas indicating that it was repackaged. The top inner flaps interconnect and were loose. Finally, the battery was fully charged, which never seems to happen with a new item. Having written this, I was not sure what to expect. I connected it to the diagnostics port and changed the battery. Started the car after the battery change and the fob worked. I am not getting any odd warnings messages and the presets were saved. So, it did what it was supposed to.The only reason it does not get five stars is that I believe it was returned.
Brigette O. Duncan
Reviewed in the United States on November 19, 2024
Very useful in protecting the computer system in my car while I replaced the battery.
RayBones01
Reviewed in the United States on September 15, 2023
I own a 2012 Cadillac CTS4 Premium. Battery was on it's way out so I bought one of these to store my car's memory settings while changing it out. Amazon delivered the next day. I charged it overnight and in the morning I see the green light which indicates the memory saver has a full charge. Went down to NAPA to pickup my battery I had ordered online the night before. I plug the memory saver into my car's ODBC port. Should see a green light but instead I get an amber light, which indicates the battery needs to be charged. Uhmmm, I just did that. Troubleshooting indicates to reset the 4AMP circuit breaker. I can't, it doesn't move. Appears to be defective. Begin the process to do a return on Amazon but because this is a battery device I had to jump through too many hoops. Getting very frustrated at this point. Amazon's automated troubleshooting system wants me to take the BRAND NEW UNIT APART and remove / reinstall the battery inside the unit. Uhmmm, no! Brand new device. I'm not about to start taking it apart. I eventually started a chat with an Amazon CSR and request to speak with a human. She sends me a link to contact a real person. Get someone on the phone but she has a very heavy accent. I have to ask her multiple times to slow down and enunciate her words. She says I will get a full refund but it will take 7 - 10 business days (I think this is what she says). We'll see. Now I guess I will order another memory saver and postpone changing my car's battery for a few days. Screw it. I'm going to lunch with a buddy ...
wayne linderman
Reviewed in Canada on February 21, 2023
worked when used to change battery.
Greg
Reviewed in Canada on February 13, 2019
great price, works well
Manuel Carpio
Reviewed in Canada on November 5, 2018
Excellent product thanks
Cliente de
Reviewed in Mexico on October 20, 2016
es lo que esperaba, o mejor, lo enviaron por correo oficial por lo que no hubo problemas de aduana como ocurre por ese medio, tardado pero llegò
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