You need one specific battery: a CR2032. It’s the same battery that powers many watches, calculators, and even some fitness devices. You can buy a five-pack for around five bucks at any drugstore or online.
Pro tip: don’t buy the cheapest off-brand. A quality battery like Panasonic or Energizer lasts noticeably longer. The price difference is pennies, and the peace of mind is worth it.
Keep a spare in your glove box. You’ll feel like a modern-day MacGyver when you help a stranded friend at the mall parking lot. Bonus: it’s a great conversation starter at parties. (Okay, maybe not, but you’ll feel prepared.)
