Ordered the 3-pack. They are charged straight out of the box, enough that I was able to recharge my cell phone; however, the power bank needed to be recharged after that. I laid it out in the sun, full sun, southern California sun, and it took about six hours to fully charge up. Easy to use device, very intuitive...I plan on giving one of the units to my daughter and son-in-law for Christmas as he is a gadget guy and they spend a lot of time outdoors so will find good use for it. The other one goes into my automobile bug-out bag.