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DeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-Pack vs DeWalt DCB2108 20V MAX XR 8 Ah Battery

Buy the two-pack of 4 Ah batteries if you run several 20V MAX tools and want spares that keep each one light and balanced. Buy the single 8 Ah battery if one tool does the heavy, continuous work, such as a circular saw, grinder or string trimmer, where runtime per charge matters more than swapping packs. Both use DeWalt's tabless cell design and overmolded base, and owners rate the 8 Ah highly for runtime and heat. The 4 Ah packs are easier to handle and fit tight spots; the 8 Ah weighs about 2.2 lb and is bulkier.

  • Choose the DeWalt 4 Ah two-pack if you want two lighter packs to spread across several tools and swap on the fly.
  • Choose the DeWalt 8 Ah Powerpack if one high-draw tool needs the longest run per charge and you can live with the extra weight.

Prices

  • DeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-Pack: $92.00 at Tool Pass Pro (last seen Nov 9)
  • DeWalt DCB2108 20V MAX XR 8 Ah Battery: $90.91 at Tool Pass Pro (last seen Nov 9)
  • Difference: the DeWalt DCB2108 20V MAX XR 8 Ah Battery is $1.09 cheaper than the DeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-Pack at the latest prices (Nov 9)
DeWalt
DeWalt 20V MAX XR Powerpack 4Ah Batteries - 2PK - DCB2104-2

DeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-Pack

DeWalt 20V MAX XR Powerpack 4Ah Batteries - 2PK - DCB2104-2

5(5 ratings)
$92.00at Tool Pass ProChecked 57 min ago
See all prices and details
Visit Tool Pass Pro
Pros
  • Two packs, so one charges while the other works
  • Lighter and better balanced in drills and impact drivers
  • Tabless cells and overmolded base for jobsite durability
  • LED charge indicator on each pack
Cons
  • Half the capacity of the 8 Ah per pack
  • Shorter runtime in saws, grinders and other high-draw tools
  • No charger included
DEWALT
DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery

DeWalt DCB2108 20V MAX XR 8 Ah Battery

DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery

4.6(57 ratings)
$90.91at Tool Pass ProChecked 58 min ago
See all prices and details
Visit Tool Pass Pro
Pros
  • Long runtime per charge for demanding tools
  • Handles heat better under continuous load
  • Fits every DeWalt 20V MAX tool
  • Strong owner ratings for power and lifespan
Cons
  • Only one battery in the box
  • Heavier and bulkier, which shifts tool balance
  • No charger included
  • Takes about an hour to recharge

What separates them

DeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-PackDeWalt DCB2108 20V MAX XR 8 Ah Battery
Capacity per battery4 Ah8 Ah
Batteries in the boxTwoOne
Weight per batteryLighter, easier to balance in small toolsAbout 2.2 lb, noticeably heavier
Runtime under heavy loadShorter, suited to lighter and intermittent workLonger, built for sustained high-draw use
Heat handlingTabless cells help, but smaller capacity runs hotter soonerTabless cells plus larger capacity resist heat buildup better
Physical sizeCompact, fits tight spaces and overhead workTaller and wider, can feel nose-heavy
Charge timeShorter per pack at the same charger outputAbout 60 minutes on a suitable 20V MAX charger
Owner feedbackFewer published ratings for this exact pack4.6 out of 5 from 57 ratings, praised for runtime

Price history

$229.00$113.95
Oct 30Nov 10
  • DeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-Pack: lowest $113.95 on Nov 10 at 24hr Supply.
  • DeWalt DCB2108 20V MAX XR 8 Ah Battery: lowest $114.99 on Nov 9 at Amazon; $229.00 on Nov 10.

Prices at every store

DeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-Pack

  • Tool Pass ProNew

    In stockReturn policy

    $92.00Checked 57 min ago
    Visit Tool Pass Pro
  • 24hr SupplyNew

    In stock

    $113.95Free shippingChecked 55 min ago
    Visit 24hr Supply
  • WalmartNew

    In stockSold by Vegas Power Tools

    $129.99Free shippingChecked 55 min ago
    Visit Walmart
  • WalmartNew

    In stockSold by Sceglio EnterprisesReturns: Sold by a Walmart Marketplace seller; returns go to the seller under the seller's returns policy.

    $112.75+ $47.00 shippingChecked 57 min ago
    Visit Walmart
All 24 stores and price history →

DeWalt DCB2108 20V MAX XR 8 Ah Battery

  • Tool Pass ProNew

    In stockReturn policy

    $90.91Checked 58 min ago
    Visit Tool Pass Pro
  • eBayNew

    Availability unknownSold by palmou1983 (100% positive, 197 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $100.00+ $8.71 shippingChecked Nov 8
    Visit eBay
  • AmazonNew

    Availability unknown

    As an Amazon Associate, Deal.ai earns from qualifying purchases.

    $114.99Free shippingChecked Nov 8
    Visit Amazon
  • WalmartNew

    Availability unknown

    $117.99Checked Nov 4
    Visit Walmart

Also available at

  • WalmartCheck price at Walmart
  • Dewalt Authorized SellerCheck price at Dewalt Authorized Seller
  • Tool NutCheck price at Tool Nut

Store links may earn us a commission.

All 22 stores and price history →

Specs compared

SpecDeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-PackDeWalt DCB2108 20V MAX XR 8 Ah Battery
Battery capacity4 Ah8 Ah
Power sourceBatteryCordless
Voltage20V—
Battery chemistryLi-Ion—
Battery series20V MAX* XR®—
Batteries included2—
Chargers included0—
Cordless or cordedCordless—
Product typeBattery—
Compatible productsDEWALT® 20V Cordless Tools—
Country of originMexico (subject to change)—
Condition—New
Show all 35 specsShow fewer specs
SpecDeWalt DCB2104-2 20V MAX XR 4Ah Battery 2-PackDeWalt DCB2108 20V MAX XR 8 Ah Battery
Model—DCB2108
Power Voltage—20V
Battery Voltage—20V
Battery Type—Lithium-Ion
Number Of Batteries Included—1
Battery Charge Time—60 minutes
Battery Run Time—Longer without fear of overheating, Increased e…
Weight—2.2 lb (individual battery)
Height—5 in
Length

What reviewers say

DeWalt DCB2108 20V MAX XR 8 Ah Battery

  • 4.6 / 557 ratings

Rated 4.6 out of 5 from 57 ratings, the DCB2108 is well regarded for runtime and power in demanding tools. Owners treat it as a step up from older 5 Ah packs.

What people mention
  • RuntimePraisedOwners say the 8 Ah capacity keeps high-draw tools running far longer between swaps.
  • PowerPraisedReviewers report more torque and less bogging than with older 5 Ah packs.
  • WeightMixedThe extra capacity adds bulk, which some users notice in overhead or one-handed work.
  • BuildPraisedThe overmolded base and cells are described as surviving drops and job-site abuse.

Questions and answers

Which is better for a circular saw or grinder?
The 8 Ah. High-draw tools drain a 4 Ah pack quickly, and the larger pack runs cooler and longer between swaps.
Which is better for a drill or impact driver?
The 4 Ah two-pack. The lighter pack keeps those tools balanced, and having two means one is always charged.
Which lasts longer over its life?
Both use tabless cells and an overmolded base. The 8 Ah does less deep cycling per job, which tends to be gentler on the cells, but either should hold up well with normal use.
Is the 8 Ah worth stepping up to?
Yes if you run one tool hard for long stretches. No if you mostly do light work and value a lighter tool.
Do both fit the same tools and chargers?
Yes. Both are 20V MAX XR packs and work with all DeWalt 20V MAX tools and 20V MAX chargers. Neither includes a charger.
Can I mix a 4 Ah and an 8 Ah pack?
Yes, in tools that take one pack at a time. Do not pair mismatched packs in a two-battery tool that draws from both at once.

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More comparisons

  • DeWalt 20V MAX XR Powerpack 4Ah Batteries - 2PK - DCB2104-2 vs DeWALT Max XR Premium Lithium-Ion Compact 20V 2Ah Battery DCB203 - Two Pack
  • DeWALT Max XR Premium Lithium-Ion Compact 20V 2Ah Battery DCB203 - Two Pack vs DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery
  • DeWalt 20V MAX Lithium-Ion 6.0Ah Battery Pack (DCB206) vs DeWalt 20V MAX XR Powerpack 4Ah Batteries - 2PK - DCB2104-2
  • DeWalt 20V MAX Lithium-Ion 6.0Ah Battery Pack (DCB206) vs DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery
  • DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery vs DEWALT 20V MAX XR Premium Lithium-Ion 4.0Ah Battery Pack
  • DEWALT 20V MAX Battery XR POWERPACK 4Ah Lithium Ion Battery (DCB2104) vs DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery
  • DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery vs DEWALT 20V MAX Lithium-Ion Battery 2-Pack and Charger, 5.0 Ah, Battery Starter Kit DCB205-2c
  • DeWalt 20V MAX Lithium-Ion 5.0Ah Battery Pack (DCB205) vs DeWalt DCB2108 20V MAX XR POWERPACK 8 Ah Battery

Buying guides that pick them

  • Best DeWalt 20V MAX lithium-ion battery packs
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—
5.875 in
Width—3.375 in
Tool Type—Power Tool Battery
Tool Subtype—Batteries
Tool Series—DEWALT XR
Safety Highlights—Mitigates heat buildup, Endure potential impact…
Battery System Compatibility—DeWalt 20V MAX
Compatible Charger—20V MAX chargers
Tool System Compatibility—DeWalt XR
Compatible Tools—20V MAX tools
Included Accessories—Charger Not Included
Color—Yellow
Design Highlights—LED indicator, Overmolded base
Material—Overmolded base