This Anker USB-C power bank solved my biggest problem with portable chargers, and it's 25% off right now
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Small Size, Big Power: 45% smaller than an original 20W charger, but just as powerful. Advanced Safety Features: Equipped with our all-new ActiveShield safety system to offer enhanced protection.
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Anker Nano II 65W GaN II PPS Fast Charger Adapter review - Simply awesome! - The Gadgeteer
Anker Nano 30W USB-C Wall Charger review