I vote to crack that baby open and see what's inside. We need long lasting batteries for today.,(reply>), But why hasn't the battery deteriorated yet through natural causes? ie the moisture in the pastes used in it or the natural degradation of any of the other component's of the battery.,(reply>), LetTheFloodIn Plus the corporate world would never allow for a battery that 'last forever'. If they do they would sell then but would never need to resell them to the same person. So they would be losing money and so on. <br><br>Same thing with tire companies, the oil and car industries, cell phone, etc. List goes on and on.,(reply>), We have far superior batteries these days. The bell just uses such a small amount of electricity that the battery hasn't run out yet