IKEA Styrbar not reporting battery level (and /or FW) in ZHA

Hi.
I’m funning Home Assistant on a RPi with a ZHA-dongle. When moving from Deconz, I found that the Styrbar, and some other battery operated units does not report the battery level correctly and/or FW-versions.
I’ve got several Styrbar remotes and some show battery levels and some are unknown.
Looking at the details of them, the ones that show battery levels are within sensible limits, that is below 3V, but the ones that are unknown have levels of 25.5V and in that region.
I figure the decimal point should be moved a step to the left…
The question is why it is and how I solve that.
I believe a FW update might correct this but to make things worse, the FW version is also unknown… I did try to reconnect the Styrbar remote to Conbee to see if it was possible to find the Update there but did not succeed. I can see the FW-version in Phoscon but in Deconz I get no respons and i can’t find any file to update with.
So, if posible I need help to force a FW update through ZHA or make ZHA read the battery level correctly.
Please treat me as a Newbee as I’m no programmer ;-).
Any suggestions or ideas are more than welcome.
/MK