My wife won't charge her cell phone

[scheides]

This is so classic, a snowy/cold day like today and anna forgot to charge her phone, so it's dead, no way to get ahold of her after leaving a gmail at her office, trying to make plans for after work.

I'm usually not a worry wart, but she does this shit all the time! Any tips/hints on how to get her to remember? For me, it's easy--my phone is in my pocket, and when I go to bed I plug it in. When I leave in the morning, I unplug it and it goes back in my pocket. She puts it in her purse, so it's out of sight/out of mind all the time!