The aforementioned £20 AUKEY Power Bank will surely do the trick for anyone who wants to keep a few backup charges handy, but Mophie takes it to another level with the Charge Stream PowerStation Wireless XL. As suggested, and unlike the vast majority of portable batteries, this one’s able to charge your phone wirelessly.
Just switch it on, pop your iPhone XS on top of Mophie’s slab, and it’ll start charging. The 10,000mAh capacity is half that of the other pack, but if you love the convenience of setting your phone atop a wireless charger no matter where you are, then it might be worth the investment. And yes, it provides wired charging capabilities as well.