Slickdeals is community-supported.  We may get paid by brands for deals, including promoted items.
Heads up, this deal has expired. Want to create a deal alert for this item?
expiredStrongMoney163 posted Today 01:11 PM
  1. Deal Image
Item 1 of 5
  1. Deal Image
  2. Deal Image
  3. Deal Image
  4. Deal Image
Item 1 of 5
expiredStrongMoney163 posted Today 01:11 PM

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

$8.99

$15

40% off
Amazon
18 Comments 3,305 Views
Visit Amazon
Good Deal
Save
Share
Deal Details
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
Community Notes
About the Poster
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

Community Voting

Deal Score
+13
Good Deal
Visit Amazon

Price Intelligence

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

Deal History 

Sale Price
Slickdeal
  • $NaN
$8.99
  • Today

Current Prices

Sort: Lowest to Highest | Last Updated 10/10/2025, 07:34 AM
Sold By Sale Price
Amazon$12

Leave a Comment

Unregistered (You)

18 Comments

Sign up for a Slickdeals account to remove this ad.

Today 01:47 PM
148 Posts
Joined Sep 2014
NordsToday 01:47 PM
148 Posts
showing up "$12.85" in the midwest.
Was gunna buy one if the coupon was available, but its not
Today 02:24 PM
206 Posts
Joined Jun 2017
MoparnjToday 02:24 PM
206 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.
Today 03:09 PM
555 Posts
Joined Jul 2008
EcoCheapToday 03:09 PM
555 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
Today 03:19 PM
148 Posts
Joined Sep 2014
NordsToday 03:19 PM
148 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
Today 03:27 PM
4,037 Posts
Joined May 2006
ArcticatToday 03:27 PM
4,037 Posts
Not so great reviews...
Today 03:36 PM
44 Posts
Joined Apr 2019
Bexter86Today 03:36 PM
44 Posts
No coupon for me, CA
Today 03:40 PM
1,060 Posts
Joined Oct 2010
joeystalinToday 03:40 PM
1,060 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.
1

Sign up for a Slickdeals account to remove this ad.

Today 03:48 PM
420 Posts
Joined Jul 2019
JulianT24Today 03:48 PM
420 Posts
I don't see the clipable coupon.
Today 03:51 PM
7,282 Posts
Joined Dec 2006
big mikeToday 03:51 PM
7,282 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
Today 04:00 PM
420 Posts
Joined Jul 2019
JulianT24Today 04:00 PM
420 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
Today 04:20 PM
765 Posts
Joined Jun 2022
RelaxedPenguin2752
Pro
Today 04:20 PM
765 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?
Today 04:39 PM
362 Posts
Joined Dec 2020
LavenderRose3394Today 04:39 PM
362 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.
Today 04:45 PM
212 Posts
Joined Oct 2004
tai_sonToday 04:45 PM
212 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
Today 05:16 PM
421 Posts
Joined May 2009
DL_Today 05:16 PM
421 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.
1
1

Sign up for a Slickdeals account to remove this ad.

Today 05:23 PM
2 Posts
Joined Sep 2015
MarcA316Today 05:23 PM
2 Posts
After coupon it is $18. It states I saved $8.

Leave a Comment

Unregistered (You)

Related Searches

AutosAutomotive ToolsHome & Home ImprovementToolsPower Tool Batteries & ChargersCouponFree Shipping with Prime

Popular Deals

View All
Found by
Amazon: SOAR NBA Mini Wireless Bluetooth Speaker $4.31–$13.07 (Select NBA teams, Up to 67% Off, Many Teams Have Coupons)
1
Found by
$1.89$3.3844% off[S&S] $1.89: 16-Oz Ortega Original Taco Sauce (Mild) at Amazon
0
Found by
$374$82554% offBulova Men's Lunar Pilot Reference: 96B258 $374
0
Found by
3000W (6000w Peak) EKXBike X21 Max Electric Motorcycle w/ 60V 30AH Battery $1687 + free s/h
0
Found by
$12$2347% off[S&S] $11.68*: 110-Count 13-Gallon Glad ForceFlex Tall Drawstring Trash Bags (Febreze Clean) at Amazon
2

Trending Deals

View All
Found by
$30$6050% offDualShock 4 Wireless Controller for PlayStation 4 - Black - YMMV -$29.99
6
Found by
$16$3452% off[S&S] $15.88: 3-Pack D'Addario Guitar Strings Set (Medium Gauge 11-49) at Amazon
5
Found by
$17$3855% offRiapow Solar Charger Power Bank: 27000mAh Wireless Portable Charger Built-in Cables - 22.5W $16.99 @ Woot
2
Found by
$600$80025% offGMKtec Gaming PC, K11 AMD Ryzen 9 8945HS(8C/16T, Up to 5.2GHz), 32GB DDR5 RAM 1TB Mini PC Desktop Computer, Oculink, Dual NIC 2.5GbE LAN, HDMI/DisplayPort/USB4*2 $599.88
4
Found by
$50$8037% off$49.99: Mad Max 5-Film Collection (4K Ultra HD + Blu-ray + Digital HD) at Amazon
3