Ascher F28 and Takho Can't Connect to SC2 Pro

Hello! I have in my possession 3 different Ascher F28 SC wheels and one takho wheel, and I have trouble connecting them to 2 different SC2 Pro Bases (revisions 2.0 and 2.1). Sometimes after uninstalling and installing True Drive one of them is able to connect (either Ascher or Takho), but the other one just blinks in the True Drive and is unable to connect. Any idea as to the cause and possible fix options?

Empty batteries on the wheels, most likely.

Thanks, the problem has been fixed by replacing the batteries, though it is odd that even the bad batteries still produce 3.67 volts so they should be working but they don’t. Thank you either way!

the ER14250 battery has a strange voltage / load curve. If you measure an empty battery with a multimeter, it will show 3.6 V still, but with any realistic current draw the voltage drops massively.

Did not know that, thank you so much!