RouteJD's Coin Type Lithium-ion Rechargeable Battery 3.7V 85mAh "* Small and Round:" Round-shaped products such as multifunctional watches, bluetooth headsets and hearing aids. "*World's Highest Capacity:" RouteJD's coin cell enables extension of product's running time. This can improve application's performance. "*High-Temperature Operating Durability:" RouteJD's coin cell has reliable performance in high-temperature environment. So, it can be adapted to various applications such as vehicle key fobs, emergency touch and sport gears.