Over at Amazon, they have Dewalt 20V Max 5.0Ah battery 2-packs on sale for $122.89, down from the regular price of ~$159.
In response to another post, someone mention buying a pair of these Dewalt 5.0Ah batteries for $120 via Craigslist. $123 isn’t too much higher, and it includes a factory warranty since you’re buying from an authorized distributor.
Right now, a 2-pack of 4.0Ah batteries is currently priced at $119, and so for a couple dollars more you get 25% greater charge capacity.
Cordless power tool batteries can be pricey, and so any discount is often much-welcome.
What if you only want to buy one new battery?
At this time, you can buy a single Dewalt 20V Max 5.0Ah battery for $65 direct from Amazon.
Buy (1) 5.0Ah Battery via Amazon
If you’re looking for a deal of a slightly different nature, Amazon (and other dealers) have the compact 3.0Ah battery 2-pack for $99