Good POWER/BATTERY BANKS? I found these

I am about to go on holiday and was thinking I could use a battery bank. Since I live in Italy my choice is pretty narrow: there's the 10K Cheero one for 60€, then when I typed battery bank on amazon the first results were
-"EasyAcc 10k" one, 22€ #1 most sold item
-"XTPower, 10k" 19€ #1 most sold
-"Swees, 2nd gen, 12k" 20€
-"RAVPower", 10400, 23€ #1 most sold
Do you guys know these or have any suggestions? Thanks in advance

I have one from Anker. (as do like 5 of my friends). They are okay in value and offer 18 months of warranty (which I found out because my battery broke after like 14 months but they sent a new one. The failure was something with the charge level detection. It reported empty but if I plugged in it reported full after 10 secs (which was okay because I had the warranty replacement)

I have the 10.000 mAh that charges my phone for 4-5 times. A buddy has the 16.000 mAh thats like 1.6 times as good ;)

You can find them on Amazon.it

ok, thanks man