Rolling Square / Everyday carry

TAU 2 Keyring Power Bank

A small reserve of power with a place to come home to.

A 2,000mAh emergency keyring power bank in Mercury Black, with USB-C, Lightning and Micro-USB connections and a charging dock. Returning it to a powered dock replenishes the battery. It is a small top-up, not a promise of a full phone charge.

Why we’d gift it

For the person who remembers their keys more reliably than their spare battery.

$39.90 USD at last check

Mercury Black

Available when checked on October 30, 2026.

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