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expiredStrongMoney163 posted Oct 10, 2025 01:11 PM
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expiredStrongMoney163 posted Oct 10, 2025 01:11 PM

DeWalt DXAEOBD Battery Maintainer for Use with 20V Battery - YMMV - $9

$8.99

$15

40% off
Amazon
19 Comments 5,254 Views
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Amazon has the "DeWalt DXAEOBD Professional 1 Amp Battery Maintainer for Use with 20V DeWalt Lithium Battery Pack"

It plugs in to your OBD port and maintains your vehicle battery via a Dewalt 20-volt battery.

Price: $12.85 $13.06

Clip coupon >>> $8.99

The price fluctuates daily, and the coupon could be regional.

In addition, I only see this coupon when I am logged in.

... so YMMV

Update: I am no longer seeing the coupon (and I'd just decided to buy it)

Previously front page at $13, popular at $15

https://www.amazon.com/DXAEOBD-Pr...B09Y7M9C82
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Deal Details
Community Notes
About the Poster
Amazon has the "DeWalt DXAEOBD Professional 1 Amp Battery Maintainer for Use with 20V DeWalt Lithium Battery Pack"

It plugs in to your OBD port and maintains your vehicle battery via a Dewalt 20-volt battery.

Price: $12.85 $13.06

Clip coupon >>> $8.99

The price fluctuates daily, and the coupon could be regional.

In addition, I only see this coupon when I am logged in.

... so YMMV

Update: I am no longer seeing the coupon (and I'd just decided to buy it)

Previously front page at $13, popular at $15

https://www.amazon.com/DXAEOBD-Pr...B09Y7M9C82

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Model: DeWalt DXAEOBD Professional 1 Amp Battery Maintainer for Use with 20V DeWalt Lithium Battery Pack

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Sort: Lowest to Highest | Last Updated 11/1/2025, 04:43 AM
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Amazon$10.89

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19 Comments

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Oct 10, 2025 01:47 PM
161 Posts
Joined Sep 2014
NordsOct 10, 2025 01:47 PM
161 Posts
showing up "$12.85" in the midwest.
Was gunna buy one if the coupon was available, but its not
Oct 10, 2025 02:24 PM
207 Posts
Joined Jun 2017
MoparnjOct 10, 2025 02:24 PM
207 Posts
$12.85 in New England too. Bought it anyway, because for under $13 grabbing one of my many Dewalt tool batteries sounds way easier than dragging out a second car battery and making sure it's charged for my current memory backup.
Oct 10, 2025 03:09 PM
559 Posts
Joined Jul 2008
EcoCheapOct 10, 2025 03:09 PM
559 Posts
Coupon worked for me in California. The product reviews are great from some and faulty from others. Worth a shot at $9. Thanks OP
1
Oct 10, 2025 03:19 PM
161 Posts
Joined Sep 2014
NordsOct 10, 2025 03:19 PM
161 Posts
Quote from EcoCheap :
Coupon worked for me in California. The product reviews are great from some and faulty from others. Worth a shot at $9. Thanks OP
thats because dumb people don't read the directions, and use it incorrectly.
I guess dewalt could have done a better job in the instruction book, but all the good reviews are from people who can read, the bad ones are from people who have no clue how to use it....

As long as you can read the instruction book, and read a few reviews for verification, it should be a good product.

I decided to buy it even though its not the $9 one you are getting
1
Oct 10, 2025 03:27 PM
4,049 Posts
Joined May 2006
ArcticatOct 10, 2025 03:27 PM
4,049 Posts
Not so great reviews...
Oct 10, 2025 03:36 PM
45 Posts
Joined Apr 2019
Bexter86Oct 10, 2025 03:36 PM
45 Posts
No coupon for me, CA
Oct 10, 2025 03:40 PM
1,067 Posts
Joined Oct 2010
joeystalinOct 10, 2025 03:40 PM
1,067 Posts
does this do any desulfation? i could see that being a big benefit. seems like minimal utility to save vehicle settings when changing the battery once every 4-5 years.
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Oct 10, 2025 03:48 PM
433 Posts
Joined Jul 2019
JulianT24Oct 10, 2025 03:48 PM
433 Posts
I don't see the clipable coupon.
Oct 10, 2025 03:51 PM
7,301 Posts
Joined Dec 2006
big mikeOct 10, 2025 03:51 PM
7,301 Posts
This is a OBD port plug in to maintain "memory" while changing car batteries. It can help with storage, but you have to realize that's not what it's designed for and it stops if you change the battery unless you also unplug it from the obd and plug it back in. Many of the negative reviews are caused by that. Ultimately if you're not a mechanic you probably dont need this, even at this price.
1
Oct 10, 2025 04:00 PM
433 Posts
Joined Jul 2019
JulianT24Oct 10, 2025 04:00 PM
433 Posts

Our community has rated this post as helpful. If you agree, why not thank JulianT24

Quote from joeystalin :
does this do any desulfation? i could see that being a big benefit. seems like minimal utility to save vehicle settings when changing the battery once every 4-5 years.
It's more of a memory saver than a battery charger. When you plug it in to the OBDII port it keeps your accessories powered for one hour, which is long enough to change the battery or whatever. After one hour it goes to sleep. From there, it wakes up and checks your charge level every 5 hours, topping you off if voltage has dropped enough from full.

So, yeah, not really for restoring or charging batteries. It's for maintaining the time and presets when disconnecting/changing a battery and it's for keeping the battery charged when you have to park a vehicle for a long time. I guess it can also help if you have a phantom power drain that hasn't been addressed.
1
Pro
Oct 10, 2025 04:20 PM
785 Posts
Joined Jun 2022
RelaxedPenguin2752
Pro
Oct 10, 2025 04:20 PM
785 Posts
Will this work with a 60v flex volt battery? I see this is a obd2 port tool , this winter I would use it on a classic w/o one if I bought it. I'm sure it's not difficult to convert or get a female obd2 port and make an adapter. I wonder what kind of run time I'd get? Flexvolt 9.0 would I get a few weeks?
Oct 10, 2025 04:39 PM
368 Posts
Joined Dec 2020
LavenderRose3394Oct 10, 2025 04:39 PM
368 Posts
Quote from RelaxedPenguin2752 :
Will this work with a 60v flex volt battery? I see this is a obd2 port tool , this winter I would use it on a classic w/o one if I bought it. I'm sure it's not difficult to convert or get a female obd2 port and make an adapter. I wonder what kind of run time I'd get? Flexvolt 9.0 would I get a few weeks?
Yes, FlexVolt batteries work with any 20V tool.
Oct 10, 2025 04:45 PM
214 Posts
Joined Oct 2004
tai_sonOct 10, 2025 04:45 PM
214 Posts
$3.98 off coupon come up with $9.30 price for me in CA. However, there are 25% 1-star review. For me, 10% 1-star will automatic sounds the alarm, 15% or above 1-star is a no go.
1
Oct 10, 2025 05:16 PM
423 Posts
Joined May 2009
DL_Oct 10, 2025 05:16 PM
423 Posts
Quote from tai_son :
$3.98 off coupon come up with $9.30 price for me in CA. However, there are 25% 1-star review. For me, 10% 1-star will automatic sounds the alarm, 15% or above 1-star is a no go.
Sounds like the reviews are from people who didnt RTFM.
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Oct 10, 2025 05:23 PM
2 Posts
Joined Sep 2015
MarcA316Oct 10, 2025 05:23 PM
2 Posts
After coupon it is $18. It states I saved $8.

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