![Best power bank 2023: Charge your smartphone, tablet, laptop or Nintendo Switch anywhere | Expert Reviews Best power bank 2023: Charge your smartphone, tablet, laptop or Nintendo Switch anywhere | Expert Reviews](https://images.expertreviews.co.uk/wp-content/uploads/2022/11/best-power-bank-uk-2022-phone.png?width=626&height=352&fit=crop&format=webply)
Best power bank 2023: Charge your smartphone, tablet, laptop or Nintendo Switch anywhere | Expert Reviews
A power bank can charge another device while it is being charged. How does it 'know' not to charge itself when a cable is connected from its output to its input ports? -
![I plugged my power bank into itself and it started to charge. I think I broke logic. (it was not harmed.) : r/funny I plugged my power bank into itself and it started to charge. I think I broke logic. (it was not harmed.) : r/funny](https://i.redd.it/ywbpnu62sj521.jpg)
I plugged my power bank into itself and it started to charge. I think I broke logic. (it was not harmed.) : r/funny
![LPT: Want unlimited power? Get a USB power-bank and plug it into itself whenever it's low. You'll never have to look for an outlet ever again. Great for traveling. : r/ShittyLifeProTips LPT: Want unlimited power? Get a USB power-bank and plug it into itself whenever it's low. You'll never have to look for an outlet ever again. Great for traveling. : r/ShittyLifeProTips](https://i.redd.it/o66ow49y7yb11.jpg)