Regarding using DatCon/CsvView to process a .DAT log file. It depends on which DJI platform you're interested in. The more recent platforms will have encrypted .DAT log files and can't be processed by DatCon/CsvView. AFAIK these platforms and...
Flight Reader and my free log viewer (above) are only able to read unencrypted or encrypted TXT flight logs.
If DatCon cannot read the DAT flight logs, then they probably cannot be read. @BudWalker would know better than me though.
Is this from a DJI manual?
It's not possible to store DJI batteries at a 100% charge for an extended period of time. They'll automatically discharge down to the proper storage level within a few days.
If charging batteries back up for storage...