Battery use

[EM41]

I found the problem, when connecting to USB the calculator increases its processorspeed but doesn't draw power from the USB all the time.
Tried 3 different cables and two other power sources (powerbank, phonecharger).
Somehow the calculator doesn't change over or starts at USB and then goes back to battery, you can see the voltage drop.

Now after changing the battery the machine is dead, no display nothing, so I guess a hardware problem.

[EM41]

After some remote diagnosis the conclusion is that the processor is defective. I will receive a new PCB.
So no bugs and nothing to worry in general.

[EM41]

Just received a new PCB and everything works fine.
I also ordered a DM42, now I have two new toys to play with.