Anker
Anker power banks
Power Banks
The reference point for charging, properly specified, properly certified, sensibly priced.
Power Banks
A 20,000mAh power bank doesn't deliver 20,000mAh to your phone. Conversion losses between the internal cells and the output take roughly a third, so expect around two-thirds of the printed figure in practice. Output wattage matters more than capacity for anything larger than a phone.
Where it wins
A 10,000mAh unit is two phone charges and pockets easily. USB-C PD models can charge a laptop. Pass-through charging means one wall socket at night.
Where it costs you
Real delivered capacity is about two-thirds of the label. Heavy — 20,000mAh is roughly 350g. Airline rules cap you at 100Wh, about 27,000mAh.
What to check
10,000mAh suits a day out, 20,000mAh a weekend, and anything larger is usually a laptop decision. For a laptop check the output wattage, not the capacity, many large banks still cap at 18W, which won't charge a MacBook while you use it. Keep it in hand luggage; airlines forbid these in the hold.
Products
UGREEN
UGREEN power banks
Power Banks
Anker's closest rival, often cheaper and unusually good at cables and adapters.
Baseus
Baseus power banks
Power Banks
Broad, cheap and generally well-reviewed charging and car accessories.
INIU
INIU power banks
Power Banks
Budget power banks that consistently review above their price.
Power Banks
Power Banks
Capacity is the number everyone reads and the one that misleads most.
Links to Amazon on this page are affiliate links. We earn a commission on qualifying purchases, at no extra cost to you.