QuickerTek EyeBattery Sanho was the first company to really make a splash with its external battery packs for MacBooks, but QuickerTek, more known for its Wi-Fi accessories, is in the game too. It’s just introduced the most recent version of EyeBattery ($280, aka Newest EyeBattery). Alongside the “most versatile” and “most powerful” options it also offers, this pack juices up any MacBook; there are separate versions for MagSafe 1- and MagSafe 2 equipped computers.QuickerTek claims the battery will provide up to four extra hours of run time to a 15” MacBook Pro with Retina display, so we’d expect that 13” MacBook Pros and MacBook Airs would get even more of a boost. The aluminum box is relatively small, at 6.3 inches long, 2.9 inches wide, and an inch thick. It connects to your computer using a modified MagSafe cable, included with the EyeBattery. We don’t know how long Apple will let them get away with it, so if you’re in the market, you may want to strike sooner than later.