Power Bank Calculator
Too many mAh numbers, too little clarity? Find the perfect power bank size in 15 seconds.
🔋 What Power Bank Do You Need?
Power banks rate capacity at 3.7V. Your device charges at 5V. The voltage conversion loses ~30%. A 10000 mAh bank delivers ~6500–7000 mAh to your phone. Normal for all models.
Yes: max 100 Wh (~27000 mAh) in carry-on. Never in checked luggage. Most travel banks (10000–20000 mAh) are well under the limit.
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