Have you ever been stuck somewhere without any access to power? I’m thinking about situations like an outdoor photoshoot where you need to top up camera batteries and use a laptop running Adobe Photoshop. Or how about being able to carry on working when there’s a power cut? Back in the 1980s, we used to have UPS (uninterruptible power supplies), large boxes with massive rechargeable batteries inside that could automatically turn on and keep a computer running within milliseconds of a power cut.
Fortunately, these days, out laptops don’t gobble up quite so much power but it’s still useful to have a source of back-up power when you need it and many of us already use power banks for