Ugreen 25000 mAh
Fast charging power bank 145W
Ideal for laptops/tablets/phones - anything and everything requiring USB charging.

This has plenty of power, but is not as portable as i would like for my purposes. 
I charged it from new, then used it for my chromebook and phone, which did not deplete it.
Recharged then put aside - it's stayed at 100% for a couple of weeks.
I believe it's had fewer than 5 charging cycles.

I am not sure that the pre-filled information is absolutely accurate but all information visible on rear of box.
Comes with paperwork and unused pouch.

You need a good USB cable and a charger to get the best out of it.