hp50g and power bank

[pier4r]

I tried a search but nothing useful was returned ( site:hpmuseum.org power bank 50g ).

Did someone try to keep the hp50g coupled with a power bank to handle intensive computations? (this because my 4 AAA batteries, ~700 mAh each, last very few hours and the calculator always complains about low battery)

I have a 2200 mAh power bank but it should be less helpful than the 4 AAA batteries, although I'll try. nevertheless if someone did tests already, would be nice to know.