Energizer 2450 3V Lithium Coin Battery (2-Pack) — 10-Year Shelf Life! $6.94 CAD (31% Off)

Amazon.ca currently has the Energizer 2450 3V lithium coin battery 2-pack for $6.94 CAD (list price $9.99, 31% off). Prime members get free shipping; otherwise orders over $35 CAD ship free.

CR2450 is the cell size used by a lot of small devices — heart rate monitors, glucose meters, key fobs, watches, kitchen scales and toys. Lithium runs longer than ordinary alkaline coin cells and holds power for up to 10 years in storage, so it's ready when you need it.

They're rated from -30°C to 60°C, so they hold up in the car or outdoor gear, and they're mercury-free. The child-resistant packaging is a bit fiddly to open, which is the point.

Two for $6.94 works out to under $3.50 apiece. Nobody ever stocks these until they need one — and buying them last minute usually costs more — so grabbing a pack at a discount and leaving it in a drawer makes sense.

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