The HyperMac MBP-222
The HyperMac MBP-222 is a large, heavy object. It weighs about 4.7 pounds [2.13 kg] and is 10.1L x 5.91W x 1.34H inches [256L x 150W x 340H millimeters]. This is a nice compact size that allows for it to be easily stored in a backpack or notebook case. The weight is not too much until you consider that a single Gallon of water is roughly eight pounds. This means that on the trail you would need to sacrifice a little more than a half gallon of water or roughly two meals worth of food [standard MREs [Meal Ready to Eat] weigh at two pounds per pack].
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That coupled with any other tech gear you may want to bring could make the HyperMac a tough decision on extended hikes [such as through hikes on the Appalachian Trail]. Of course if you are hiking this distance you have probably arranged for food drops at strategic points anyway so food might not be too much of a problem.
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The HyperMac would also be very good for use during presentations where power access is limited. You can leave your MacBook on the HyperMac and plug your projector or other devices that cannot run on battery into the available outlets.
Looking at the design, the HyperMac is a nice looking battery. It is well labeled and has all of the controls and sockets on the same side. The HyperMac is capable of power/charging both a MacBook and a Single USB device like an iPhone or an iPod at the same time. HyperMac has also included a charge indicator that you can push to see a rough indication of how much battery time you have left. If you are connected to a MacBook you can also turn the battery on or off. If you are charging a USB device it will simply charge the device without the need to power cycle the HyperMac.
As I mentioned above the HyperMac holds 222 Watt Hours of power, this can cover quite a bit of trail time. The HyperMac also charges fairly fast. From a drained state to full charge took a little less than 6 hours [a good night's sleep on the trail].
The car charger that is included with the HyperMac is a pure DC adapter. This, according to HyperDrive is better than a traditional AC/DC inverter in that it does not need to invert the current and create AC spikes which could damage the system. Of course a high quality DC Inverter will have protection against this happening but it is still a good thing to know about the HyperMac's car charger.
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