Look for something with 10,000mAh from either Anker or Rav Power. Both do good quality battery packs at decent prices, and 10,000 ones are small enough that you don't notice you have them but large enough to provide a couple of charges at least.
While a little heavy, I use an Anker 32,000 power bank. Do not believe they allow them on airlines. We have two of them and even just one can charge my iP 11 Pro Max twice, my 12.9 iPP, and my iPad Mini (gen 5) and still have juice left over.
To save weight we have two Anker 20,000 powerbanks. Much lighter and smaller/slimmer and can easily charge your iP11 twice.
A 20,000mAh battery should charge an iPhone 11 six times over, never mind twice.To save weight we have two Anker 20,000 powerbanks. Much lighter and smaller/slimmer and can easily charge your iP11 twice.
Will they allow any power banks on airlines ? Like the smaller ones or no ? None?
I have a 15000mAh SNÜG powerbank that gets the job done very well, it can recharge my 11 Pro Max to 100% about 3 times on one charge but I mainly used it to charge my old iPad Air 2 as the iPads battery was on its way out so the powerbank would basically keep the Air 2 going throughout the day until I got my iPad Pro.Do not want too heavy but not to little power either. At least be able to charge my phone 2 times total if possible.
If no one knows it is ok.
Will they allow any power banks on airlines ? Like the smaller ones or no ? None?