Power banks: (W vs Wh) VS Security droids
I have an Anker 20000 mAh power bank, which at 5V output would be 100 Wh (20000/1000*5), at the usually-quoted "100W" limit for carry-on devices. Fine for in-town use, or car/train travel.
However, Anker UNhelpfully puts "(200W)" on the label beside the "20000 mAh" spec, which is true at 10V, and I'm sure one day I would be stopped by Security who just know "100W", so if I want to fly it would have to be left behind - don't want that.
Any experience here arguing electrical unit arithmetic with Security droids? Or should I just resign myself to purchasing a "flight" unit with 100 or less on the label, or no W/Wh on the label and perhaps I print my own "professional" sticker?