Which power bank for mobile phone?

I use Navi with the phone on the bike and that puts a heavy strain on the battery.

Which power bank?

How long does it take to load the phone with Powerbank

Are solar power banks recommended?

Can I connect mobile phone with Powerbank and navigate in real time and make phone calls?

Huawei P20 Pro will become the mobile phone.

For the P20, I would recommend the one 20,000mAh power bank. Should be enough for several loads

I own the Huawei P20 Pro.

1. WHICH POWERBANK?

https://m.ebay.de/itm/401397624404

2. How long does it take to load? Unfortunately, one can't say exactly that is always different zmb. (Charging cable, powerbank output, mobile phone input)

3. SOLAR POWERBANKS? In my opinion no.

4. CHARGE PER POWERBANK AND TELEPHONE AT THE SAME TIME USW? Naturally!

How long does it take to get to LA?

I can't say unfortunately is always different.