Rolling Square TAU 2 (2nd Gen) - Power Bank Keyring for Smartphones with Digital Business Card Feature NFC/QR Code, 2000mAh,Compatible with USB-C, Micro USB and Lightning, Grey

Great product. Small enough to carry anywhere

This is a must have for any phone user, USB-C, Micro USB and lightning all built in, a great emergency battery size but also acts as a charging cable if you are near a USB outlet, all packaged into a very small pocket friendly little unit. A must have as an emergency back up.

Yes it is compact but for the price I could probably find another brand with a higher charge capacity.

Fantastic mini power bank, perfect for an EDC kit or when travelling really light. 2000mah, so it's not going to fully charge your phone, but it is an ideal emergency back-up. It has built in lightning and USB C connectors. If you want a normal power bank, choose something else that is 10,000 or 20,000mah - they are also cheaper. If you want a very small emergency power source in a bug-out bag, EDC kit or just in your pocket, choose this!

Don't buy. Sooooo slow and will do my standard Samsung to 20 % but takes forever 😴. Just tried it again and phone went up 3 % in 21 mins 🙈. If only it was fast charge. Waste of money, don't buy 🙏

Most useful thing you can have in your pocket!

This is currently priced at £29.90. I like the idea behind it, but it lacks power... It only has a 2000amh battery so you will only get about 30% additional charge if using a new phone, so given the price and the size of others there are better options available. It is also quite heavy to keep on a key ring.

Great piece of kit,no need to carry seperate leads or charger,will give you around a 25% charge in average phones

Mi piace la compattezza del powerbank e la praticità. La capacità è sufficiente per le emergenze in cui la batteria si sta per esaurire e raggiungere l'80% abbastanza velocemente. Nota negativa è il fatto che la batteria si consuma in stand by abbastanza velocemente e se non si ricarica di frequente si potrebbe rimanere a piedi.

Funktioniert einwandfrei. Die Bedienungsanleitung ist nur leider sehr unverständlich, gerade der Sinn des „Tippens“.

It is a convenient charger but I find that it is too bulky as a keychain; still handy to carry when on the move. I have had a couple of unfortunate instances when Tau2 charged my iPhone and subsequently drained it. It left my phone with even less power than before it had required a recharge. I presumed I had accidentally tapped Tau2 too many times as I was on the go, which resulted in it feeding off my iPhone. Furthermore, the charger detached once from the hook yet, I was fortunate to have noticed it. I don’t keep it attached to my keys so I don’t lose it. Tau2 is smart perhaps too smart with its “gesture” feature: you must tap it the correct numbers of times before charging it. A decent charger that will give your phone sufficient “juice” to last a little longer, but it is not reliable. I find Tau2 is a sensitive charger that needs too much care to be a staple item when travelling.

In pratica, non ha mai funzionato, è diventato ben presto un portachiavi troppo ingombrante e pesante.

Funziona ma nulla di eccezionale, la batteria dura poco