Devices such as Google Glass and Nexus 7 may be fun to use but their battery does not last you forever. It is frustrating to run out of battery juice when you really need your gadget. The System-S Backup Battery Charger Extender is a handy emergency charger that lets you use 4 AA batteries to recharge your gadgets. It provides hours of battery for your devices. The charger is compact and slim.
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Google Glass AA Battery Charger
We tested this AA Battery Extender to charge Google Glass, Kindle, and Nexus 7. It simply works as long as you provide it with 4 decent AA batteries. Not too expensive either.
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