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What’s Tau?

Made through Rolling Sq. — the corporate at the back of the truly cool inCharge X, 6-in-1 charging cable — Tau is designed to stay your smartphone charged up and your keys in a single position. 

Tau is a tiny chronic financial institution key fob that magnetically attaches to a wall-mounted charger. Within the morning, you take hold of your keys along side a fully-charged chronic financial institution. While you come again within the night time, you pop your keys again within the holder and fee up the facility financial institution.

This manner, the place your keys are, and also you at all times have a charged-up chronic financial institution.

Additionally: The 5 absolute best moveable chronic banks

Oh, and the facility financial institution includes a integrated USB-C, a Lightning cable, and a microUSB cable, so you do not also have to bear in mind to convey separate cables. 

Rolling Sq. Tau tech specifications


  • Lightning (iPhone, iPad, iPod, AirPods)
  • USB-C units
  • microUSB units


  • Measurement: 60 x 45 x 12 mm / 2.32 x 1.77 x 0.47 in
  • Weight: 40 g / 1.4 ounces
  • Capability: 1400 mAh
  • Weight: 350 g / 12 ounces

Within the field

  • Tau chronic financial institution
  • Tau Dock and USB chronic cable
  • Screws and wall plugs
  • Nano suction double-sided layer
  • Person handbook
  • Eco-friendly packaging

Additionally: This tiny USB-C charger packs a large number of chronic

Tau package on a brown background.

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In keeping with Rolling Sq., Tau is the smallest chronic financial institution on the earth. I will’t ascertain this, however it indisputably is small and lightweight, and it is no larger than a automobile key fob. 

The 1400mAh battery is not going to be sufficient to completely fee a contemporary smartphone, and the 1A charging chronic is not going to be rapid, however it’s going to get you out of a low battery jam, evidently.

Model, input, output, and capacity info for Tau

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At the backside of the important thing fob is a magnetic charging port that hooks in with the dock. The dock itself will also be connected to a wall the usage of the equipped screws of a nano suction pad.

Closeup of Tau's magnetic charging port

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At the different finish are the 2 charging cables, one for USB-C, the opposite for Lightning and microUSB.

Closeup of Tau's charging cables

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Additionally: Faux Lightning cables can injury your iPhone. This is how to ensure yours is authentic

This is the fob within the charging dock, with the dock charging cable connected. It is a neat bundle.

Tau against a brown background in dock with keys attached

Tau in dock with keys connected… able for motion.

Adrian Kingsley-Hughes/ZDNET

Tau is the entirety I be expecting from Rolling Sq. — a top quality product that in truth solves an actual drawback. A tiny chronic financial institution disguised as a key fob and a well-mounted charging dock turns this from what may well be thought to be a gimmick into a useful gizmo. 

That is absolute best for individuals who put out of your mind the place they have put their keys and run out of the home within the morning with a smartphone that is virtually lifeless.

Supply Via

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