External battery packs are a dime a dozen, but you might want to pay attention to this one. Razer has unveiled the Power Bank, a 12,800mAh external battery designed primarily for laptops. It's clearly intended as a companion for Razer's own portables, and can extend the life of a Blade Stealth to as long as 15 hours. That's more than a little helpful if you're stuck traveling all day. However, its reliance on USB-C makes it compatible with any laptop that can charge using the newer connector. Yes, you could keep a MacBook running on this brick if you don't mind the style mismatch.