DeWalt 20V 4.0Ah battery - $49.99 (PM at Home Depot for $45 and FS)

These typically sell for $89 (or more). Plenty of stock online, available in store or ship to store. No shipping to home (for anything they sell, unfortunately).

https://www.peaveymart.com/tools-weldin ... egoryCode=

Update #1
Price beat with Home Depot to make it $45 (as described by others below). This may not be available in all provinces.

Many thanks to juinny for introducing this idea!

Update #2
HD is out of stock at this time (Sept 10th at 3:40pm). The deal is valid at PeaveyMart until Sept 16th, so I will update if HD has more in stock.

Meanwhile, $49.99 is still a great deal and they have plenty in stock.

Update #3
Back in stock at HD (Sept 11th at 9:20am) so price beat is available again to get it for $45. Thank you iowsun!

HD also ships to home for free even when buying 1.

Update #4
Out of stock again at HD (Sept 11th at 6pm).

Update #5
Back in stock again at HD (Sept 12th at 10:18am). Thanks devilsknight!

Update #6
Out of stock again at HD (Sept 13th at 7:15pm). Hang tight, it is quite possible they will have more in stock soon.

Update #7
Back in stock again at HD (Sept 14th at 7:30am). BUT, out of stock at the PeaveyMart warehouse, so a PM may not work for you. Stock left at some stores.

Update #8
Still in stock at HD (Sept 16th) and the last day of the sale at PeaveyMart. Some stores in Ontario still have stock, and quite a few stores in the west (mostly AB and SK) still have plenty of stock.