The Vevor CR2450 lithium coin battery pack includes 20 non-rechargeable 3V button cells designed for dependable, long-lasting power. Each battery provides 600mAh capacity and supports a wide range of devices such as key fobs, glucose meters, thermometers, watches, clocks, and remote controls. The batteries feature a leak-proof sealed structure, non-mercury construction, and durable stainless steel housing. Individual blister packaging helps with storage and safer handling. With up to 1680 hours of discharge time and a shelf life of up to 5 years, this pack is built for reliable everyday use.