mapthomas, May 18, 2019 : I was looking for a place to put this but I am 20 minutes short of 24 hours on my initial charge (new One plus 7 Pro). I have one percent left on my battery. I am not sure portable charging will be a necessity? My LG V30 would last a out 8-10 hours on normal to heavy use and the battery was necessary. Hopefully I just have to charge at night.