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Your cart is empty.Maintain your vehicle battery using your own DeWalt 20 volt lithium battery packs (not included) , the DeWalt DXAEOBD Battery Maintainer is compatible with AGM, GEL or WET automotive batteries. Simply plug the unit into your vehicle's OBD-II port, attach your own DeWalt 20V lithium battery pack and you are ready to maintain your vehicle's battery. LED indicator shows charging status. This unit has a Memory Saver that preserves car settings while charging your car battery for systems such as radio, seats, clock and dashboard settings. Alsoo works with the DeWalt FlexVolt battery on the 20V setting.
NC Jack
Reviewed in the United States on May 23, 2025
So far so good in keeping by Mustang's battery topped off! Even after being idle a couple of weeks, the car's battery voltage is exactly where it is supposed to be. VERY happy with this product!
andrew a
Reviewed in the United States on March 30, 2025
Had a draw on my battery and this prevented me from having to jump my car every morning
tony
Reviewed in the United States on February 7, 2025
It's complete garbage that doesn't work and when you return it to Amazon, don't expect to see your refund anytime soon. They've had my return since January 29th. It's now February 7th.Really not starting to like Amazon anymore.
ROZ3Y
Reviewed in the United States on January 6, 2025
I purchase this unit for my work, it helps you maintain the customers preset setting before removal of battery. Love it.
Client d'
Reviewed in Canada on September 2, 2024
Ne fonction pas, le vendeur honore, pas la garantie, après un contact avec le vendeur pour demander un échange ou remboursement plus aucune nouvelle d eux et et je ne peux retourner à Amazon car plus d un mois (5semaines)
Josh Perry
Reviewed in the United States on July 29, 2024
Off the bat, I was happy and hopeful that this would work. The status lights performed as expected and I thought I might have a unit that lasted.I went to change the battery out after a couple weeks (I used a large 9.0 AH DeWalt battery) and it showed 1/3 bars on the meter, which tells me that it did something for a while.When I tried to change out the battery, the unit was dead. No lights. No function. No current. Not sure why or what’s happened, but there is an obvious design flaw for so many of these to fail.It’s a great idea, but I won’t give it my recommendation until they fix the problem that causes the failures. Poor quality control, maybe? It’s also worth noting that these are made by a third party and sold under the DeWalt name, officially licensed. DeWalt doesn’t actually manufacture them.
Kendrick
Reviewed in Canada on June 30, 2024
No load the unit provides 14.4V. 1A should be plenty to maintain a battery even with todays onboard electronics due to the fact most ecu goes to sleep after a few minutes. If you have more than 300mA parasitic draw you might have an issue.One problem with this Dewalt tool is that when you remove the 20V battery, there is residual voltage and as some users have experienced you need to wait for it to dissipate or the unit goes into failsafe and stops working. The fastest way to change out a 20V battery is to use a resistor between the input connectors of the tool ( I use a 1K ohm). That will discharge the internal capacitor and that way you can then slip on a new battery, plug the OBD connector back and walk away. Dewalt should of designed it with a discharge circuit when you pull the battery off.Other than that it works just fine.
James baylis
Reviewed in Canada on March 4, 2024
Works great for old acura and hondas with the anti theft radio. No more remebering the password after you disconecct the battery
Luis Robles
Reviewed in the United States on March 14, 2024
Pretty easy to use it does what it is supposed to it won’t fully charge your battery because it’s not a charger it is a maintainer it’s supposed to just keep your battery maintained not charged for those who don’t know the difference all in all very good tool to have
Preston
Reviewed in the United States on February 22, 2024
Bought this to help keep my small car charged since I only drive it every couple weeks or so. Plugged in just fine and for the first 2 weeks it drained the 20v dewalt down and kept the car batt charged.I put the second battery in and the red light never came back on, checked the car after 2 weeks dewalt batt was fully charged, my car was dead as a door hammer.Sent the charger into bacus retail they replaced it no issue. Second charger didn't even make it through one dewalt battery. My car is dead as a hammer again.Don't buy, waste of money.
Jeff B.
Reviewed in Canada on November 25, 2023
It's too weak at 1 amp even to only maintain. When you change the 20v battery, it diesn't always come back on. You have to wait for a few hours for it too reset or something. Many people reported this. It was a great idea but very badly implemented. One of the very few DeWalt tool that I returned. Do not buy it.
Eric S.
Reviewed in the United States on October 6, 2023
This is such a great idea. We do a fair amount of batteries in our shop. Having to find and enter radio codes is a real PITA so we always need to lug the jumper pack over and put it in the car to keep the memory alive. This is so much better and it works! We have used it about 5 times now. The is one problem with it. If you plug in to the OBD2 port first then it goes into failsafe mode and wont work until some time passes and it resets itself. So install the battery pack 1st!
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