A major update to the AudioMoth firmware adding a number of bugfixes and features, including the much requested feature of retaining configuration settings after power is lost. Now, once a configuration is set using the AudioMoth Configuration App, your AudioMoth will remember its configuration when the batteries are replaced. Make sure you set the clock before you deploy though!
Another major feature is added support for chime-based clock setting. This means that a computer and a USB cable are no longer required to set the time on your device (while they can still be used). This tone can come from one of the new AudioMoth mobile apps, or the newly supported RFCx Companion app. Apply the configuration using the AudioMoth Configuration App, then set the clock when out in the field!
Updates for the firmware, Configuration App, Time App, and Flash App also include a number of bugfixes and general improvements, including improved clock accuracy, meaning the timestamp of all your recordings will now be even more accurate.
Download and apply the new firmware to your devices using the AudioMoth Flash App. Simply open the app and the latest firmware will be available for download.
AudioMoth firmware update notes
AudioMoth Configuration App update notes
If I understand this correctly, you need to use the AudioMoth Time app every time you change the batteries (after initial configuration with AudioMoth Configuration App, Firmware 1.5.0). The configuration is stored on the micro-controller, but once batteries are removed, the time would "disappear" as it has no power to keep track of time.