Smart Home Auto Charger works in conjunction with smart home automation software such as "Home Assistant" to switch on a charger connected to a smart plug when the battery is low. It will switch off the charger when the battery is fully charged. The app consumes minimal battery. Smart Home Auto Charger switches the charger by making a web request to your smart home automation software or "Tasmota" flashed smart plug. It does so by monitoring the battery level.