Can a power bank charge a laptop?

Yes, if it supports USB-C Power Delivery at 60W or higher. Most modern ultrabooks (MacBook Air, Dell XPS 13, ThinkPad X1) charge at 60-100W via USB-C. Check your laptop's charging wattage and match it with a power bank that outputs at least that amount. A 65W power bank charges a 65W laptop at full speed.

How long does a power bank last before it needs replacing?

Most quality power banks retain 80% capacity after 500 charge cycles. If you charge your power bank once per day, that is about 1.5 years to 80% capacity. With typical use of 2-3 charges per week, a power bank lasts 3-5 years before noticeable degradation. Anker and Baseus typically warrant their banks for 18 months.

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