Is it normal to refresh db after charging, when no files were added or deleted?

It shouldn’t ‘refresh database’ as part of the normal operations unless something was changed (added or deleted) to the memory. The v1 e200 series players do this on every start-up when a MicroSD card is inserted and it can get annoying. But starting with the v2’s and on to the FUZE, this no longer happens.

Try doing a soft re-set and see if that helps.