Inventor Dr. Ramesh Kale has been working on a low-cost, disposable "smart" pacemaker for under $1,500. The device is implanted in a pocket-sized battery pack that an individual wears around their waist. The pacemaker is connected to the battery pack via a small wire. When the device senses irregular heartbeats, it sends a signal to the battery pack, which then notifies the individual's doctor. The battery pack is replaceable, and is expected to last up to a year.