Whether you're playing Metroid Prime on your Nintendo Switch or surfing Prime Day sales on your phone, the Anker Prime portable battery pack will keep your device powered practically forever. This incredible 20,000mAh battery is 31% off this Black Friday, and it can power basically anything you need it to.
I've even stopped using all my other power banks after I got one of these and take it everywhere with me. Not only is the 20,000mAh bank large enough to last an entire day while charging basically every device you own, but it'll last way longer than that when you're just topping up a couple of phones here and there.
