4 bars is what I aspire to. I do not seem to get them always. Don't ask why, you can leave it charging from a wall or whatever all night and day ad sometimes you only get 3 bars and an orange light.
However, when I do get the 4 bars, I will also get 4 bars when I next switch on.
I suspect the fuel gauge is, at best, an approximation & when the battery issues get remedied, the "dipstick" we presently use, may improve
