BUYING GUIDE
Power Bank Buying Guide: Capacity, Output and Safety
Understand usable capacity, USB-C PD, charging speed, device compatibility and safety before you buy.Capacity is not the whole story
A 10,000mAh or 20,000mAh rating is the cell capacity, not the exact energy your phone receives. Conversion losses mean real delivered capacity is lower.
Match output to your devices
For modern phones and tablets, USB-C Power Delivery can be more useful than simply having many ports. Check both total output and the maximum output of a single port.
Safety should be non-negotiable
Choose reputable products with over-current, over-voltage, temperature and short-circuit protection. Battery quality and certification matter more than a very low price.