Quite self explaining:
When using the electric wrench in lossless mode and you dismantle some machines, the charge status bar have not been affected. If you click once on the lappack in your inventory, it will show you immediately the actual value by updating the charge status bar.
Maybe it's only a bit optical fixing, cause it already tells you when you're out of energy for lossless operating mode, but it's still a bug 
Greetings,
foxxx0