Do you have a battery charger of some kind?
For the MC13, Manker recommends a high discharge cell. Sometimes they will be more specific, but they are vague. I’d just get a Samsung 30Q. They are a great all around battery.
All lithium ion are going to be 3.7 volt nominal, 4.2 volt max. Some might be 4.3, but are rare so ignore those. The best brands and Samsung, LG, Panasonic/Sanyo, Molicel and Sony.
I know the goods stores in the USA but I don’t know of any stores in Canada. The store you buy from is a big deal. Some places sell fakes, so you want a store with a good reputation.
Try these stores in Canada.