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VC Smart Camera battery
Is there a battery in VC Cameras? What happens if it goes down? Can my data be lost?
Yes, VC Cameras do have a battery.
Its purpose is only to keep the real-time clock up-to-date.
Data is saved either on the flash EPROM or on the MMC card, which are non-volatile memories (they need no power to keep the data): there is therefore no risk to lose data if the battery goes down (which has not happened even once for 8 years and more than 30000 cameras sold).
The status of the battery can be accessed with the system variable LOWBATT.