Anker Nano Power Bank (5,000mAh)

For a colleague or friend who's forever on 3% battery, a small power bank is the rare Secret Santa gift that earns a permanent place in a bag. Anker is a sensible brand to reach for because its charging kit has a strong reliability reputation, and the pocket-sized Nano models keep the whole thing under budget while still delivering a useful top-up. The clever bit is the built-in connector, so there's no cable to lose, but it means matching the phone: buy the USB-C version for recent Android handsets and iPhone 15 onwards. Lightning versions exist for older iPhones but are increasingly hard to find as Apple has moved to USB-C, so USB-C is the safer default. It's the least glamorous pick here and the most likely to be used every week.