BatteryBox Slim is the external battery your MacBook needs

You can buy an external battery for your smartphone pretty much anywhere, but it’s harder to get one for your laptop — and it’s even more difficult to find one that’s compatible with a MacBook. But that’s about to change thanks to BatteryBox Slim, an external battery that can recharge all MacBook models and offer some exciting additional features as well. DON’T MISS: WWDC 2016 preview: Everything Apple plans to unveil next week As the name suggests, the batter