Yes, battery back-up power is available. An optional internal battery pack enables the ETS to operate for up to one month if its normal power supply is interrupted. If the ETS cannot forward temperature readings to the CORIS servers for any reason including an Internet outage, these sensor readings will be stored inside the ETS until communication with the servers is restored. Once communication is restored, the ETS will transmit stored readings in between transmission of current readings every two minutes. The TH-L module runs on batteries, and will also store readings internally if communication with the servers is interrupted. The TH-L can internally store about one week’s worth of readings.
Since the gateway does not have an internal battery option, many customers power the Gateway with a battery pack that has a USB port. CORIS will provide a special USB cable to power the Gateway from an external battery. As long as the battery can be charged while it is discharging through a USB port, the battery will power the gateway and stay fully charged. If power to the battery is lost, the gateway will continue to run on the battery. A large capacity battery can power the gateway for a few days.