Ring doorbell battery charge- uk main supply?

I’m seeing constant conflicting advice - can I plug the usb lead into a UK mains power usb charger to charge?
Or does it need less voltage like a computer like it suggests?
Sticker says 8-24 vac?
Many thanks for your help!

Hi @user11400. To charge one of our Quick Release Batteries, you can use the USB cable and a charging block, similar to what you would use to charge a phone. I hope this helps.