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?
expiredDG52 posted May 5, 2026 6:09 PM

2-Pk DEWALT 20V MAX Lithium-Ion 4.0Ah Batteries

$79

$219

63% off
+ Free S&Hat Lowe's
12K Views
Visit Lowe's
Deal Details
Lowe's has 2-Pack DEWALT 20V MAX Lithium-Ion 4.0Ah Batteries (DCB240-2) for $79. Shipping is free or select free store pickup where available.

Thanks to Community Member DG52 for finding this deal.

Note: Availability for pickup may vary by location.

Features:
  • Reliable runtime - Take on tough jobs with this battery that delivers a 4Ah capacity for consistent runtime on the jobsite
  • State-of-charge - Get quick visibility to your battery's state-of-charge with the LED indicator to help avoid interruptions
  • Part of the 20V MAX* system- This battery is compatible with 20V MAX* tools and chargers
  • Includes: (2) DCB240 20V MAX* 4Ah Batteries
  • 3-year warranty

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • This price is $20 less than the previous FP deal.
    • Our research indicates that this deal is $50 less (39% savings) than the next best available price from a reputable merchant with prices starting from $129 at the time of this post.
  • About this product:
    • Rating of 4.5/5 from 220+ Lowe's customer reviews.
  • About this store:
    • Details of Lowe's return policy (here)

Original Post

Written by DG52
Product Info
Community Notes
About the Poster
Deal Details
Product Info
Community Notes
About the Poster
Lowe's has 2-Pack DEWALT 20V MAX Lithium-Ion 4.0Ah Batteries (DCB240-2) for $79. Shipping is free or select free store pickup where available.

Thanks to Community Member DG52 for finding this deal.

Note: Availability for pickup may vary by location.

Features:
  • Reliable runtime - Take on tough jobs with this battery that delivers a 4Ah capacity for consistent runtime on the jobsite
  • State-of-charge - Get quick visibility to your battery's state-of-charge with the LED indicator to help avoid interruptions
  • Part of the 20V MAX* system- This battery is compatible with 20V MAX* tools and chargers
  • Includes: (2) DCB240 20V MAX* 4Ah Batteries
  • 3-year warranty

Editor's Notes

Written by SubZero5 | Staff
  • About this deal:
    • This price is $20 less than the previous FP deal.
    • Our research indicates that this deal is $50 less (39% savings) than the next best available price from a reputable merchant with prices starting from $129 at the time of this post.
  • About this product:
    • Rating of 4.5/5 from 220+ Lowe's customer reviews.
  • About this store:
    • Details of Lowe's return policy (here)

Original Post

Written by DG52

Community Voting

Deal Score
+73
Good Deal
Visit Lowe's

Price Intelligence

Model: DEWALT 2-Pack, 20V MAX* 4Ah Battery

Deal History 

Sale Price
Slickdeal
  • $NaN
  • Today

Current Prices

Sort: Lowest to Highest | Last Updated 7/27/2026, 08:33 PM
Sold By Sale Price
Ace Hardware$219

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

23 Comments

Sign up for a Slickdeals account to remove this ad.

Pro
May 9, 2026 2:19 AM
3.4K Comments
Joined Jul 2008
45root
Pro
May 9, 2026 2:19 AM
3.4K Comments
I have these. Got them on a glitch with a saw for $100. Iirc, these have the 21700 cells.
May 9, 2026 5:34 PM
6.1K Comments
Joined Mar 2006
Core2QuadMay 9, 2026 5:34 PM
6.1K Comments
Quote from notslow :
Good deal, but these are not very reliable batteries, the 5ah is way more dependable. The new Powerpack 4ah is amazing, but costs more.
I have many of these batteries, never had an issue. Never had an issue with 5Ah. I've had 2x 2Ah packs die though. I own 30+ dewalt tools and 15-20 pack or so.
1
May 9, 2026 6:06 PM
514 Comments
Joined Dec 2016
notslowMay 9, 2026 6:06 PM
514 Comments

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

Quote from Core2Quad :
I have many of these batteries, never had an issue. Never had an issue with 5Ah. I've had 2x 2Ah packs die though. I own 30+ dewalt tools and 15-20 pack or so.
This battery, the 8ah battery and the 12ah Flexvolt all use Samsung 40T cells. That cell is rated for much less output than the 30T cells used in most of the dewalt 21700 cell batteries. The 40T cells are also known to be less durable and more prone to failure from heat, high discharge or low voltage. There is a ton of info online about these Samsung cells. Dewalt has replaced the 4ah and 8ah with tabless batteries and will be releasing the tabless 12ah Flexvolt in a few months. So they are replacing all of their 40T cell batteries with Ampace tabless cells. I had 7 out of 8 of these fail in less than two years, some only lasted a few months. Same with the 12ah flexvolts, killed all but one. They may hold up with light use, but I doubt any of these will be working after eight or ten years, like the 5ah are.
Last edited by notslow May 9, 2026 at 11:08 AM.
3
May 11, 2026 3:44 PM
744 Comments
Joined Oct 2020
ToolsForDadMay 11, 2026 3:44 PM
744 Comments
Quote from W04H :
$79 with free tool or get out of here 😉
Kobalt yeah, but not Dewalt
May 11, 2026 4:02 PM
69 Comments
Joined Nov 2017
W04HMay 11, 2026 4:02 PM
69 Comments
Quote from ToolsForDad :
Kobalt yeah, but not Dewalt
I see the 2 compact 4ah dewalt battery deals and flash to the glorious day that they were $99 with a free tool. Typed initial comment more jokingly
May 11, 2026 10:18 PM
744 Comments
Joined Oct 2020
ToolsForDadMay 11, 2026 10:18 PM
744 Comments
Quote from W04H :
I see the 2 compact 4ah dewalt battery deals and flash to the glorious day that they were $99 with a free tool. Typed initial comment more jokingly
I remember 2021 like it was 2021. Good days. Got the router
May 12, 2026 3:16 AM
12 Comments
Joined Apr 2026
MellowCemetery690May 12, 2026 3:16 AM
12 Comments
Good deal

Sign up for a Slickdeals account to remove this ad.

May 12, 2026 6:02 PM
122 Comments
Joined Dec 2018
TheDragonAdvances27May 12, 2026 6:02 PM
122 Comments
I wish Amazon would match

Join The Conversation

Share your experience with the Slickdeals community

Share information with the community. Please follow our Community Guidelines and be kind!

Popular Deals

Trending Deals