We're assuming that if you're considering buying someone a smartphone accessory then they are probably quite into phones. The problem with being into phones, though (and we know), is that the more you use them the more the battery runs down. Very few Android users will tell you their phone battery lasts all day long.
When you consider how heavily we rely on our phones these days, you start to feel a bit lost when you can't use one because it's out of battery and you don't have a charger. And that's exactly why we feel everyone should have a power bank in their stocking this year.
Power banks come in all sizes, from small banks you can slip into a pocket to high-capacity packs that will keep you going days away from mains power. Our top pick is the Zendure A2 (£25.11 from Amazon UK), which hits the sweet spot in terms of capacity, performance, size, durability and price.
However, we've tested just about every popular power bank on the market, so check out our definitive guide to the top 20 power banks to find the best model to gift.