Anker MagGo Power Bank 6.6K: Anker MagGo Power Bank 6.6K has a 6,600mAh battery that can fully charge most iPhones once. It's Qi2-certified, meaning it offers 15W fast charging capabilities, and is fully MagSafe compatible, offering twice the speed of standard 7.5W wireless chargers for MagSafe-enabled iPhone 13, 14, and 15 models and smart Android phones that support 15-watt wireless charging.
Anker Nano Power Bank (USB-C): This 5,000 mAh power bank weighs 3.5 ounces or 100 grams. It features 22.5 watts of fast charging power with the option to charge two devices simultaneously if you plug a cable into the power bank's USB-C charging/output port. (Charging two devices simultaneously cuts charging power in half, delivering 11.25 watts to each device.)
myCharge Hub 6700 (discontinued): MyCharge's Hub portable chargers come in several different sizes and not only have a built-in foldable wall plug, but also have integrated Lightning and USB-C cables, so you can charge both Apple and Android devices. It's a bit bulky, but with a 6,700mAh battery it should be able to charge your smartphone almost completely, depending on its size. The boost 10,050 mAh model still available and about $25 more.
Nimble Champion: Nimble's updated Champ portable charger uses recycled plastic in its construction. You have to pay a bit more for the green one, but it's a nice, compact 10,000mAh charger that has 20W PD fast charging with dual USB-C ports (one on either side of the power bank) that let you charge two devices at the same time . If you are charging two devices, your charging speeds will be limited to 10 watts per device.