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Tau helps encourage you to maintain your power financial institution modified by simply clipping to your keys, and it expenses with a distinctive magnetic charging base.
We’ve all been there — you are nearly prepared to finish your day, and while you test your cellphone, you notice you are minutes away from a useless battery. Sometimes this is not a massive deal, however it’s a large downside should you anticipate a essential cellphone name or textual content, or have to hail an Uber to get residence.
Rolling Square has tried to resolve this downside with Tau, a keyring-sized power financial institution that hooks onto your keys, guaranteeing that you have all the time acquired power wherever you go.
Design
Tau is a small power financial institution, a little bigger than a key fob, that attaches to your keys. The thought is that you’re going to all the time have a backup battery wherever you go, because it’s related to an merchandise you are going to carry round anyway.
The battery portion recharges through a magnetic charging base, one designed to hold on your wall through an adhesive strip or screws. While Tau gives a piece of nanosuction adhesive that you should use, we opted for a 3M strip out of an abundance of warning, as sure kinds of paints might be liable to pulling up with nanosuction adhesives.
This is particularly good, because it offers you a devoted spot to recharge Tau and cling your keys. The design is nice as a result of it solves each our problems with dropping our keys and routinely forgetting to cost a power financial institution earlier than leaving for the day.
However, there’s a little bit of a draw back to the design, as Tau solely recharges through the magnetic dock. There’s no option to manually recharge the battery by different means.
Should you need to recharge the battery whereas out, you are out of luck.
However, if you wish to take Tau’s dock with you, we recognize that the charging base might be slid off of the again cowl. This characteristic means that you can take Tau — and its charger — on the street.
Specs
Tau weighs simply a little over 1.4 ounces and might maintain as much as 12 ounces. On its personal, we did not assume the battery was too giant whereas connected to a set of keys, however should you’ve acquired a key fob and an AirTag, you may discover it a little cumbersome.
The battery is 1,400mAh, which ought to recharge an iPhone 13 from 0% to 45%. Sure, it is not going to recharge your cellphone totally, however it might undoubtedly be greater than sufficient to maintain your cellphone functioning whilst you look forward to your rideshare of selection to select you up.
![Tau can charge USB-C, microUSB, and Lightning-compatible devices](https://photos5.appleinsider.com/gallery/46929-91454-AC1BA1FB-BEAC-475B-8C27-62B1E71ADAF5-xl.jpg)
Tau can cost USB-C, microUSB, and Lightning-compatible units
To cost your cellphone — or some other rechargeable electronics you’ve — Tau comes outfitted with a USB-C charger together with a Lightning and micro USB twin charger.
Overall
Tau will not be designed to be a charger to maintain heavy cellphone customers up and energetic all day, however it’s a incredible resolution for many who fear about their cellphone dying earlier than their day is up.
It’s a good backup for emergencies, and its budget-friendly worth makes it a great gift for anybody.
- Charging dock offers customers a handy place to cost Tau, cling keys
- Small dimension is simple to take wherever
- Can cost USB-C, microUSB, and Lightning units
- May be too giant to suit comfortably on keys with present key fobs
- Battery life is comparatively low in comparison with different powerbanks on the market
Rating: 4 out of 5
Where to purchase
If you would like to select up a Tau of your personal, they’re out there in charcoal black, pure white, and agave inexperienced. You can decide one up from Rolling Square for $29.