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If the data logger battery fails while logging data, will the data be lost if it has not been offloaded?

If the battery failed while logging, the data is still retrievable and can be recovered. Recovering data after a Battery failure isn't a problem with MadgeTech data loggers. They store their readings to non-volatile EEPROM or flash memory. If the batteries die in the middle of logging, most of the data will remain intact. Because the electronics of the data logger do not operate properly with a dead battery, there might be some invalid data, usually at the end of the log. Once fresh batteries are inserted, you will usually be able to download your data without any problems. If you are unable to download the data after replacing the battery, support@madgetech.com to determine if another recovery method may work.

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