Is the 4.0Ah battery worth it over the 2.0Ah?

Yes if you run tools for long stretches. It roughly doubles runtime, and at $43.99 at eBay as of November 4, 2026 it costs little more than a smaller pack.

Will it fit my Craftsman V20 tools?

It fits any tool and charger in the Craftsman V20 line. It does not fit Craftsman's older 19.2V or other brands' tools.

How long does it take to charge?

On the standard V20 charger, expect roughly an hour or more for a full charge. A fast charger cuts that time noticeably.

Does it have a charge indicator?

Yes. A button and LED lights on the pack show how much charge is left.

Battery prices drop during Craftsman sales and holiday promotions, and multi-packs lower the per-battery cost. The current low is $43.99 at eBay as of November 4, 2026.

Where can I buy the Craftsman V20 4.0-Amp Hour Lithium Ion Battery?

6 stores we checked sell it, including eBay, Atwoods Ranch & Home Goods, Lowe's, Mercari, Fleet Farm.

Craftsman V20 4.0-Amp Hour Lithium Ion Battery

Q: Where is the Craftsman V20 4.0-Amp Hour Lithium Ion Battery cheapest?

At eBay, for $43.99, 51% under what the other stores charge, as of our latest check.

Best price now

$43.99at eBayObserved at 12:34 PM

51% under what the other stores charge

Compared across 5 stores. Prices are checked against each store and labelled with when.

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Our take on the Craftsman V20 4.0-Amp Hour Lithium Ion Battery

The Craftsman V20 4.0Ah lithium-ion pack is a spare or upgrade battery for the V20 cordless line, which covers drills, impact drivers, saws, trimmers and blowers. At 4.0Ah it roughly doubles the runtime of the 2.0Ah packs that ship with most V20 kits, and it has a built-in charge indicator. The best new price is $43.99 at eBay as of November 4, 2026, with five stores listing it new.