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How to Choose a Power Bank
Technology

How to Choose a Power Bank

01/15/2026 1 min read

Capacity, power and fast charging: what mAh and watts really mean in practice.

When choosing a power bank, two figures matter most: capacity (mAh) and power (W). 10000 mAh charges a phone about twice; 20000 mAh gives 3–4 charges and is great for travel.

Fast charging

Check the supported protocols — Power Delivery (PD) and Quick Charge (QC). A 20W-plus output charges a phone quickly, while a laptop needs 45–65W.

Practical tips
  • Make sure there's a USB-C output
  • For several devices, pick a model with 2+ ports
  • For air travel, 20000 mAh is the practical limit

At Digitron you'll find reliable power banks from Baseus and other brands.

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