Rolling Square TAU 2 (2nd generation) – portable battery

Rolling Square TAU 2 is a compact and extremely practical portable keychain battery that combines fast charging, universal compatibility, and a digital NFC/QR business card in one device. An ideal solution for emergencies when your phone needs extra power.

Key advantages

• ✔ 2000 mAh capacity – up to 30% additional battery
• ✔ USB-C input/output
• ✔ Lightning and Micro USB output
• ✔ NFC + QR digital business card
• ✔ Compact keychain design

Always a charged phone

TAU 2 is your "backup" battery for everyday use and emergency situations. It provides fast charging to keep you connected when it matters most.

Smart use and convenience

Designed for everyday integration – simply attach it to your keys and charge it via the magnetic dock or USB-C connection. A double-tap allows for quick power management.

Universal compatibility

• ✔ USB-C devices
• ✔ Apple Lightning devices
• ✔ Micro USB devices

Compact and elegant design

TAU 2 is designed as a minimalist keychain – lightweight, discreet, and always at hand, without unnecessary bulk.

Additional features

• ✔ NFC/QR digital business card
• ✔ Fast charging and portable use
• ✔ Ideal for travel, work, and everyday life

Important

• Color: black

Order your Rolling Square TAU 2 today and never run out of battery again!