It probably is order of magnitude less in reality since I was looking at worst case - chargers are actually 70-sh percent efficient not 50 which almost halves i

It probably is order of magnitude less in reality since I was looking at worst case - chargers are actually 70-sh percent efficient not 50 which almost halves it. Also far from everyone on the planet has a mobile phone, let alone high end flagship. What I mean is that there are much easier fruits to pick without sacrificing even tiny bit quality of life.