Your unit-entry device has been designed to support entry via a backup mechanical key, so you will always be able to unlock your door. In the rare event that software issues lead to unexpected downtime, Latch has engineering and customer support teams that are on call to provide around-the-clock assistance.
For the Latch C2, because it inherently does not have a physical key, Latch has designed a Qi-compatible Inductive Jumpstart. This allows the device to be powered and unlocked in the event the batteries unexpectedly drain or fail, ensuring that you can access your unit by using a Qi-compatible power bank (such as the one linked here) to power the device.
Watch our Inductive Jumpstart training video here.