Tetherboard

  For battery-operated devices, there is no real way to look at the cells and know exactly how much charge is remaining. Tethercell will not only give you battery life information, but also let you control the device using your smartphone. Tethercell is a double-A sized enclosure that holds a triple-A battery replacing one double-A battery from your device giving you a smart battery. Once you have a Tethercell installed, you can use your smartphone to turn the device on or off, schedule device power, find the device or just to check the life of the battery. Tethercell only knows the charge status of the triple-A battery and since triple-A batteries [...]