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For DeWalt 20V Max 4.5Ah Lithium Ion Battery
DeWalt

For DeWalt 20V Max 4.5Ah Lithium Ion Battery

Best price now

$58.88at Big Time BatteryObserved Nov 3, 2026, 2:35 AM

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Our take on the For DeWalt 20V Max 4.5Ah Lithium Ion Battery

This is a replacement 20V Max lithium-ion battery pack for DeWalt cordless tools, listed at 4.5Ah (4500mAh) capacity. The listing also mentions 60V Flex compatibility, but DeWalt's 20V Max packs are not interchangeable with the 60V FlexVolt line, so confirm the part number before buying. At $58.88 at Big Time Battery as of November 3, 2026, it sits at the low end of what a 4.5Ah-class pack typically costs, well under DeWalt's own 5.0Ah retail pricing.

Best forOwners of DeWalt 20V Max drills, drivers and saws who want a spare packUsers replacing a worn 2.0Ah or 3.0Ah pack with longer runtimeBudget buyers who don't need the 5.0Ah or 6.0Ah premium packs
Pros
  • 4.5Ah capacity gives noticeably longer runtime than the 2.0Ah packs bundled with many kits
  • Charges on standard DeWalt 20V Max chargers
  • Compact footprint at roughly 4.8 x 3.2 x 3.5 inches
  • Price is low for the capacity class
Cons
  • Listing's 60V Flex claim is misleading; 20V Max packs don't fit FlexVolt tools
  • Only one store carries it at this price, so availability is thin
  • Not a DeWalt first-party 5.0Ah pack, so cell quality and warranty depend on the seller
  • No fuel gauge or state-of-charge indicator mentioned

For DeWalt 20V Max 4.5Ah Lithium Ion Battery prices at every store

  • Big Time BatteryNew

    In stock

    $58.88Observed Nov 3, 2026, 2:35 AM
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For DeWalt 20V Max 4.5Ah Lithium Ion Battery price history

Lowest price we've seen: $58.88 on Nov 3 at Big Time Battery. Tracked across 1 store since Nov 3.

Specifications

Voltage
20V / 60V Flex
Capacity
4.5 Ah (4500 mAh)
Chemistry
Li-Ion (Lithium Ion)
Dimensions
L= 4.79" x W= 3.24" x H= 3.52"

Questions and answers

Will this fit my DeWalt 20V Max drill?
It is listed as a 20V Max pack, so it should fit standard 20V Max tools and chargers. Check the part number against your tool's manual before ordering, since the 60V Flex mention in the listing is not accurate for this pack.
Is 4.5Ah worth it over the 2.0Ah pack in my kit?
Yes if runtime matters. A 4.5Ah pack holds more than twice the charge of a 2.0Ah pack, which means longer cuts and fewer charger trips, at the cost of some extra weight.
Is $58.88 a good price?
It is low for a 4.5Ah-class pack; DeWalt's own 5.0Ah packs usually sell for more. With only one store at that price as of November 3, 2026, buy when you see it in stock rather than waiting for a deeper cut.
Does it work with 60V FlexVolt tools?
No. FlexVolt tools need FlexVolt batteries; 20V Max packs are a different mount. Treat the 60V Flex line in the listing as an error.
What's in the box?
The listing describes a single battery. No charger is included, so you'll need an existing DeWalt 20V Max charger.
How long does it take to charge?
Charge time depends on your charger. On a standard DeWalt 20V Max charger, a 4.5Ah pack takes roughly an hour to an hour and a half; faster chargers cut that down.
Where is the For DeWalt 20V Max 4.5Ah Lithium Ion Battery cheapest?
At Big Time Battery, for $58.88, as of our latest check.

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