# TAU 2 Keyring Power Bank by Rolling Square

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.

- Category: Everyday carry
- Selected variant: Mercury Black
- Price snapshot: $39.90 USD
- Availability snapshot: Available
- Last checked: 2026-10-30
- Canonical page: https://shopcoolshit.com/finds/r5-tau-2/
- Brand source: https://rollingsquare.com/products/tau-2-a-new-kind-of-power-bank
- Shop: https://rollingsquare.com/products/tau-2-a-new-kind-of-power-bank?variant=47205894324543
- Affiliate link: No.

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