There’s nothing worse than getting halfway through a boss fight only to watch your battery warning blink on screen. That’s where these Amazon Prime Day power bank deals come in. I’ve rounded up the best ones for the Steam Deck and similar handhelds, and they all bring serious wattage, smart features, and enough capacity to keep you gaming through flights, commutes, or couch marathons. Make sure you’ve grabbed the 30-day free Amazon Prime trial to access these discounts too. Let’s get into it: