If your power bank label shows both mAh and Wh, airlines usually use Wh. If it only shows mAh, you need voltage (typically 3.7V for Li-ion cells).
Disclaimer: This is a calculator, not airline policy. Rules vary by airline/country and may require approval above certain limits.
Power bank Wh ↔ mAh converter — Convert power bank capacity between Wh and mAh using voltage (3.7V/5V/custom). Includes common airline thresholds (100Wh/160Wh). Shareable, browser-only.
Example: Use this tool to sanity-check numbers quickly, then share the link if you need to discuss with others.
FAQ: (1) Does it upload my data? No—runs in your browser. (2) Can I share results? Yes—use the share link feature. (3) Is it authoritative? Treat it as a convenience, not professional advice.
行動電源 Wh ↔ mAh 轉換器 — 用電壓（3.7V/5V/自訂）在 Wh 與 mAh 間換算行動電源容量，並附航空常見門檻（100Wh/160Wh）。可分享連結、純前端。
範例：用這個工具快速試算與對照結果，需要討論時再把連結分享給對方。
FAQ： (1) 會上傳資料嗎？不會，計算在瀏覽器內完成。 (2) 能分享結果嗎？可以，用分享連結。 (3) 準確嗎？請把它當作便利工具，不是專業建議。