Batteries
Household batteries by size and type.
Guides and calculators
BatteriesBest CR2032 Coin Batteries
Three CR2032 coin batteries compared on what each brand's page claims: bitter coating, child-resistant packaging, storage life and the devices each is for.
BatteriesCR2032 vs CR2025 vs CR2016: What the Numbers Mean
CR2032, CR2025 and CR2016 cells share a 20 mm width and 3-volt chemistry and differ in thickness and capacity, per Energizer. A CR2 is another size entirely.
BatteriesWhat the Warning on Button Battery Packs Actually Means
Reese's Law gave button and coin batteries a federal rule. What 16 CFR Part 1263 defines, what it requires of products and packaging, and what it leaves out.