Since my last 5 trainings I always get an error when trying to upload. Last time it even backed up my data.gbp.1. After restarting and trying again (several times) it works. There are different errors, so it can help much to sent the exact error. How to I soft reset the software (the first 25 trainings were doing great).
With Glofiish X650 i have also the same battery weak message when rechearging the batt.