A battery that provides 32 hours of continuous MacBook use? Now we’re talkin’. Sound’s great until you find out that the 222Wh Hypermac external charger costs a whopping $US500.

On the plus side, Hypermac is offering some smaller capacities at more affordable prices: like a 60Wh version for $US200, a 100Wh for $US300 and a 150Wh for $US400. There’s also a car charger for powering up your Mac on the go for $US150. The devices can be pre-ordered now and are expected to ship by the end of the month. [HyperMac via Pitchengine]