As a person who believes in self sufficiency or just being prepared, I had bought a rechargeable usb power supply. a couple years ago.
I used it recently and realized that the charge strength is not as powerful as it once was.
So I kicked myself. Like a lot of things, if you don’t use it, it loses it’s potency.
Then I realized there were lots of little opportunities to use it even around the house.
We have a number of usb chargers, but it’s a pain to move them from one place to another to then be tethered to a wall socket.
So I’m making use of the rechargeable power supply at least a couple times a week.
Advice to share: If you buy a rechargeable power supply, make sure you use it once in a while to maintain the condition of the charge.