Has this been an issue? ...

I personally had no issues flashing the car or using the Durametric on Battery Powered. I had my laptop power configuration set to maximum performance.

 

Mishref, if it isn't set to maximum performance you might run into issues which can cause an error message simply due to the fact that the default setting might not allow to run all the features with your .NET Framework as well as shutting down some additional features which might slow down the performance of your laptop. In some cases it is even possible that the software won't even work. That is why we always recommend to connect the Power Supply.

Thanks, Flo