The Maxell 335 Coin Cell Battery is a tiny but capable primary battery designed to function in small electronics like calculators, watches, and medical instruments. Featuring a stable Silver Oxide chemistry, this impressive coin cell hold a 5.5 mAh charge, providing steady, long-lasting power to ensure you get the most use out of your low-drain device. With a shelf life of over 5 years, these cells are perfect to keep around the house or office for when you need them most.