Hi,
Try defaulting the battery. Then first create the hems in the and add the battery. Then via the hems go into the battery settings and try to update the battery from there. That is how i managed to upgrade the firmware of the battery. I tried multiple times updating via the devices me u in the app, it did the update but still would show 1.0.2.
Via het hems the update finally worked.
But now i have issues with the battery dissapearing from the app all the time and then it malfunctions.
For now: very bad experience.
I would not recommend the system at this time.