Energizer CR2450 3V Lithium Coin Batteries, 2-Pack — $6.94 CAD (31% Off)

Amazon.ca has the Energizer 2450 (CR2450) 3V lithium coin battery 2-pack for $6.94 CAD (list $9.99, 31% off). Prime members ship free; otherwise orders over $35 CAD ship free.

CR2450 isn't a size you'll find in every drawer, but when the device that needs it dies, it's annoying: car key fobs, heart rate straps, glucose monitors, thermometers, kitchen scales, motherboard CMOS, some smart locks and small toys. Two cells covers one swap plus a spare.

Energizer rates them for up to 10 years of storage power and a -30°C to 60°C (-22°F to 140°F) operating range, so leaving a pack in the car over winter isn't a problem. The packaging is child-resistant. Cross-reference for checking your device: 2450 / CR2450 / L52 / DL2450 / 5029LC.

4.7 stars across 6,500+ reviews and 5K+ bought last month — the kind of consumable you don't have to think about. At $3.47 a cell it beats single-pack drugstore pricing, and having a spare at home saves a trip.

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