I really wonder how important it can be to know the value of 1 bar (or 5 or maybe 9) on the battery display.
I think in Japan they did their very best in developing the e:HEV powertrain. I trust what has been developed at Honda and have not been disappointed (so far). And what the "value"(?) of 1, 2, 3, 8 or 10 bars is, I honestly don't care much, if at all.
The car is doing fine and as long as it stays that way I am satisfied (even with 10 or only 2 bars displayed).