Among its most famous members were Apple co-founder Steve Wozniak, left, and John Draper (aka Captain Crunch).
12 November 2013 4:50 am GMTUpdated: 12 November 2013 5:30 am GMT
Photo by: Daniel Terdiman/CNET
/ Caption by: Daniel Terdiman
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Is your phone battery always at 4 percent?
These battery packs will give your device the extra juice to power through all of those texts and phone calls.