On World Heart Day, a team of innovators in Pune have revealed a hand-cranked defibrillator, which can save cardiac arrest patients when there is no electricity. A defibrillator is a medical device that delivers a dose of electric current to the heart. This low-cost device, which can be powered up in 12 seconds by rotating a small hand paddle, can be a life saver in regions where electricity is scarce. Defibrillators powered by electricity are common in airports and hospitals, but this Indian-made machine costs only a quarter of imported electric defibrillators.