ROLLING SQUARE TAU 2 (2. GEN)
Keychain Powerbank — no cables, always on hand
Built-in USB-C, Lightning, and Micro-USB connectors in one — no searching for a cable. 2,000 mAh for quick emergency help, plus NFC/QR digital business card.
🎁 Get a FREE gift with your purchase
Save the most
20W Fast Charging Charger with Cable
Regularly €21.99 → with power bank purchase €0.00
Power bank €35.99 + free charger €21.99
Pay only €35.99
Save €21.99 · choose the "Perfect Pair" offer in the next step.
Free shipping over €50 · last item in stock
🔑
Keychain
Compact design that fits on your keychain or in your bag
🔌
3-in-1 Connectors
Built-in USB-C, Lightning, and Micro-USB — no separate cable needed
📇
NFC/QR Business Card
Share your contact info with a tap or scan
🔋
2,000 mAh
Quick emergency help — not intended as your primary daily power bank
Why this power bank
| Feature | Rolling Square TAU 2 | Typical power bank |
|---|---|---|
| Cables | Built-in three connectors (USB-C, Lightning, Micro-USB) | Requires separate cable |
| Portability | Keychain, always on hand | Stays at home or in a bag |
| Additional feature | NFC/QR digital business card | No additional features |
| Purpose | Quick emergency help, a few percentage points of battery | Larger capacity for all-day use |
The comparison is for informational purposes only, based on typical features of basic power bank devices, not a specific competitor.
Before you order
- Free shipping on orders over €50.
- Returns in accordance with store terms, for unused products in original packaging.
- Secure payment via Shopify (SSL-protected checkout).
Frequently Asked Questions
Is this my main all-day power bank?
No. With a capacity of 2,000 mAh, it is designed as an emergency aid — a quick extra percentage of battery when power runs low. For all-day use without an outlet, we recommend a higher capacity power bank from our offer.
What cable do I need to charge my phone?
None — TAU 2 has built-in USB-C, Lightning, and Micro-USB connectors, so you can plug your device directly without a separate cable.
What is an NFC/QR digital business card?
An additional feature that allows you to quickly share your contact information with a tap or scan.
Do I really get a free charger?
Yes. On the product page, select the "Perfect Pair" offer — the charger (regularly €21.99) will be added to your cart for €0.00. If you don't need it, you can select "Skip gift."
Last item — cable-free keychain power bank
€35.99 · last item in stock · free shipping over €50
🎁 + free 20W charger with cable (worth €21.99) when choosing "Perfect Pair"
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