Energizer lithium batteries can be used for all electronics including remote keyless entry devices, health and fitness devices, watches, calculators, and other handheld devices. Cells come in blister packs of 5 and are individually sealed. Delivers long-lasting, dependable performance in specialty devices like heart rate monitors, remotes, keyless entry systems, glucose monitors, toys, and games High Shelf Life, ensuring you have Lithium Coin Batteries ready when you need them.