Connecting 12V Powerbank to 2B

[FelixThePony]

Hello,

my Mistress loves to play me outside, sometimes spending several ours walking and playing.

The setup for this is me carrying the 2B (attached via USB to my mobile phone and Nigels Android app) in my bag and Her connecting via e.g. the broker from her smartphone.

I would like to expand the endurance of my 2B by connecting it to a 12V powerbank, e.g. something like this.

What do you think? It is recommended to attach a powerbank like that to the 12V port of the 2B (if I make a proper cable)?

Thanks for your input

Felix