These days, many companies have addressed the perpetually dying cell phone problem with battery packs. With USB output, these portable batteries - powered via wall outlets, the sun's rays or a hand crank - can charge up most mobile devices.
Yet such a solution has been lacking for the laptop, another portable device that always manages to die at critical times. Whether you're commuting on the train or watching movies on the plane, it's always a frustrating process to be stranded without power, which is why the HyperJuice batteries for Apple devices - MacBooks included - is so useful.
The HyperJuice comes in four capacities varying from 60Wh to 222Wh, the last of which can power a MacBook for up to 45 hours or the iPhone 52 times over. Clad in aluminum to complement the MacBook, the HyperJuice includes four ports for charging (DC in) and discharging (DC out and two USB ports) along with a backlit screen that shows remaining battery life and the temperature the battery is running at. The company says the lithium-ion cells can be recharged up to 1,000 times and includes a built-in short circuit to prevent overcharging and overheating.