Hi, I have the same problem.
it was working fine (my first day of using it).
I had already upgraded the firmware successfully when we started using it.
We used it a bit, then it said there says a problem, firmware not recognised, upgrade firmware. It only got through less than 20%, and then it said update failed.
Now there are no lights with either battery (which are charged). It does connect to Bluetooth during the firmware update, but does not recognise the firmware.
I choose airblock, and it only makes it until 15 to 16.69% or something like that. Each time it is one of a couple of numbers.
and then the cycle starts again.
Looks like the memory has failed?
I expected it to last a bit longer, can I get a replacement?