Meet Tau: a power bank that you can carry with your keys to charge your phone anywhere. It is ready to charge iPhone and Android devices with its MicroUSB, Lightning, and USB-C heads. It comes with a charging case that you can attach to the wall with a double-sided tape.
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Tau has a 1400mAh battery that adds hours of talk and internet time to your phone. You can find it on Indiegogo.
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