Battery operated heart rate monitors
Battery
— these devices are powered by a standard replaceable element, such as "coin" batteries like CR2032, which is a popular choice for miniature devices. Due to their low energy consumption, most modern heart rate monitors and pedometers can operate on a single charge for an extended period. Battery replacement typically takes only 2-3 minutes, making it a convenient option. As a result, the majority of contemporary fitness gadgets use batteries.Show