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DeWalt DCB2108 20V MAX XR 8 Ah Battery vs DeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack

Buy the DCB2108 8 Ah if you run high-draw tools like circular saws, grinders or a string trimmer and want the longest single-charge runtime from one pack. Buy the DCBP320-2 two-pack if you rotate between smaller tools and prefer two lighter packs you can swap. The 8 Ah uses tabless cells and carries a 4.6/5 rating from 57 owners; the PowerStack packs use pouch cells and are widely praised for power in a compact size, but 3.5 Ah each drains faster in heavy cuts.

  • Choose the DCB2108 8 Ah if you want maximum runtime per pack and mostly use one or two demanding 20V MAX tools.
  • Choose the DCBP320-2 two-pack if you want two compact packs to spread across several tools and keep one charging while you work.

Prices

  • DeWalt DCB2108 20V MAX XR 8 Ah Battery: $90.91 at Tool Pass Pro (last seen Nov 9)
  • DeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack: $108.50 at Tool Pass Pro (last seen Nov 8)
  • Difference: the DeWalt DCB2108 20V MAX XR 8 Ah Battery is $17.59 cheaper than the DeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack at the latest prices (Nov 8 and Nov 9)
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 19 h ago
See all prices and details
Visit Tool Pass Pro
Pros
  • 8 Ah gives the longest runtime of any single 20V MAX pack
  • Tabless cells run cooler under load
  • LED state-of-charge indicator
  • Overmolded base resists drops
  • Fits every 20V MAX tool and charger
Cons
  • Heavy at 2.2 lb, which unbalances compact drills and impacts
  • One pack only, so no spare while charging
  • No charger in the box
  • Bulkier than a 3.5 Ah pack in tight spots
Dewalt
Dewalt 20V Max XR Powerstack DCBP320-2 Lithium-Ion Battery Pack 2-Pack

DeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack

Dewalt 20V Max XR Powerstack DCBP320-2 Lithium-Ion Battery Pack 2-Pack

$108.50at Tool Pass ProChecked Nov 8
See all prices and details
Visit Tool Pass Pro
Pros
  • Two packs, so one can charge while the other works
  • Light enough to keep a compact drill balanced
  • Pouch cells deliver strong power for their size
  • Full DeWalt warranty on both packs
  • Fits all 20V MAX tools
Cons
  • 3.5 Ah drains quickly in saws and grinders
  • No state-of-charge indicator
  • Two packs together hold less than one 8 Ah
  • No charger included

What separates them

DeWalt DCB2108 20V MAX XR 8 Ah BatteryDeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack
Capacity per pack8 Ah in one battery3.5 Ah per battery, two included
Total capacity in the box8 Ah total7 Ah total across two packs
Cell technologyTabless cells for lower heat and higher outputPouch cells for compact size and strong burst power
Weight per pack2.2 lbAbout 1.2 lb per pack
Runtime on high-draw toolsLongest single-charge runtime in the 20V MAX lineShorter per pack; needs a swap mid-job
Charge timeAbout 60 minutes on a 20V MAX chargerFaster per pack because each holds less
State of charge indicatorLED fuel gauge on the packNo fuel gauge on the pack
Charger includedNoNo

Price history

$229.00$114.99
Oct 30Nov 10
  • DeWalt DCB2108 20V MAX XR 8 Ah Battery: lowest $114.99 on Nov 9 at Amazon; $229.00 on Nov 10.
  • DeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack: lowest $199.00 on Nov 9 at Ace Hardware; $199.00 on Nov 10.

Prices at every store

DeWalt DCB2108 20V MAX XR 8 Ah Battery

  • Tool Pass ProNew

    In stockReturn policy

    $90.91Checked 19 h 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

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All 22 stores and price history →

DeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack

  • Tool Pass ProNew

    In stockReturn policy

    $108.50Checked Nov 8
    Visit Tool Pass Pro
  • Genuine ToolsNew

    In stockReturn policy

    $189.99Checked Nov 8
    Visit Genuine Tools
  • The Home DepotNew

    In stock

    $199.00Free shippingChecked 19 h ago
    Visit The Home Depot
  • eBayNew

    Availability unknownSold by ezpawncorpnyc (98.9% positive, 13,900 ratings)Returns: Set by the eBay seller; the eBay Money Back Guarantee covers an item that doesn't arrive or isn't as described.

    $149.95Free shippingChecked Nov 8
    Visit eBay

Store links may earn us a commission. Some prices via Klarna.

All 13 stores and price history →

Specs compared

SpecDeWalt DCB2108 20V MAX XR 8 Ah BatteryDeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack
Battery Capacity8 Ah3.5Ah
ColorYellowBlack
ConditionNew—
ModelDCB2108—
Power SourceCordless—
Power Voltage20V—
Battery Voltage20V—
Battery TypeLithium-Ion—
Number Of Batteries Included1—
Battery Charge Time60 minutes—
Battery Run TimeLonger without fear of overheating, Increased e…—
Weight2.2 lb (individual battery)—
Show all 32 specsShow fewer specs
SpecDeWalt DCB2108 20V MAX XR 8 Ah BatteryDeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack
Height5 in—
Length5.875 in—
Width3.375 in—
Tool TypePower Tool Battery—
Tool SubtypeBatteries—
Tool SeriesDEWALT XR—
Safety HighlightsMitigates heat buildup, Endure potential impact…—
Battery System CompatibilityDeWalt 20V MAX—
Compatible Charger20V MAX chargers—

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.

DeWalt 20V MAX XR Powerstack 3.5Ah Battery 2-Pack

Owners of DeWalt 20V MAX tools generally rate the Powerstack packs highly for their lighter weight and steady power under load. Some note they run out sooner than the bigger 5.0Ah packs on high-draw tools.

What people mention
  • WeightPraisedOwners say the pouch-cell packs feel lighter and better balanced than the cylindrical packs they replace.
  • RuntimeMixedReviewers find runtime good for a 3.5Ah pack but shorter than DeWalt's 5.0Ah batteries on high-draw tools.
  • Power deliveryPraisedUsers report steady power under load, with less sag in saws and grinders than older small packs.
  • CompatibilityPraisedBuyers confirm the packs fit every DeWalt 20V MAX tool and charger they own.

Questions and answers

Which is better for a circular saw or grinder?
The DCB2108 8 Ah. Its higher capacity and tabless cells hold voltage longer under heavy load, so you make more cuts per charge. The 3.5 Ah PowerStack packs are better suited to drills, impacts and other lighter tools.
Which lasts longer over its life?
Both are DeWalt XR packs built for repeated cycles. The 8 Ah runs cooler under load thanks to tabless cells, which helps cell life in high-draw use. The PowerStack packs are newer pouch-cell designs, and owners report good durability, but each pack holds less, so it cycles more often for the same work.
Is the 8 Ah worth stepping up to over the two-pack?
If you run one heavy tool at a time and hate stopping to swap, yes. If you spread work across several tools or want a light pack on a compact drill, the two-pack is the more flexible setup.
Do both work with my existing 20V MAX tools and charger?
Yes. Both are 20V MAX packs and fit every 20V MAX tool and charger. Neither listing includes a charger.
Which is better for a compact drill or impact driver?
The PowerStack 3.5 Ah packs. At about 1.2 lb each they keep a compact tool balanced, while the 2.2 lb 8 Ah makes a small drill nose-heavy.
Can I mix the two on the same tool?
Yes, both are 20V MAX and interchangeable. Run the 8 Ah in your most demanding tool and the 3.5 Ah packs in lighter ones.

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More comparisons

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Buying guides that pick them

  • Best DeWalt 20V MAX lithium-ion battery packs
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Tool System Compatibility
DeWalt XR
—
Compatible Tools20V MAX tools—
Included AccessoriesCharger Not Included—
Design HighlightsLED indicator, Overmolded base—
MaterialOvermolded base—
Voltage—20V
Total batteries—2
Battery weight—544.31 Grams
Item dimensions—13.9 x 8.5 x 16.2 centimetres
Number of batteries—2 Lithium Ion batteries required. (included)
Model number—DCBP320-2