Category

Guides

Plain-English buying advice: what specs mean, what to skip, and how to choose.

• Explainer

  mAh vs Wh: Why Your 20,000 mAh Power Bank Gives Less

  mAh is measured at the battery cell's voltage, not your phone's. Here's how to convert mAh to Wh, why you lose a third on the way out, and what to compare instead.

  October 29, 2026

• Explainer

  Power Bank Airline Rules 2026: Limits and In-Flight Bans

  Power banks must go in your carry-on, 100 Wh is the no-approval limit, and many airlines now ban using them in flight. The 2026 rules, airline by airline.

  October 29, 2026