I’m sure you’ve resolved by now, but just in case,
In response to your first issue, running your frezzi on the Dionics is not recommended by Anton Baeur. Their Lithium Ion line(dionics) aren’t really built for that. THe ProPacs are the real workhorse, but not optimal. Hytrons also work fine. But with the Dionics not only do you get a short run time, but your also decreasing the life of the battery with each drain.
On the second note, it may be possible to reset the battery from it’s current flashing state. Take a paper clip and dip it into the tiny hole just below/above the LED display.