[Feature request] High battery drain alert

[SilverIce]

Is your feature request related to a problem? Please describe. I'm getting frustrated whenever I launch power-hungry apps, but forgot to connect Mac to power supply. And intense battery drain degrades it..

Describe the solution you'd like I would like to have an option to be alerted when something like this happens. For instance, is_on_battery && battery_dicharge_in_5_min > 1%

Describe alternatives you've considered I use Parallels, so process monitoring isn't an option. That won't work

Additional context