'4 button chargers' BUG

[Cardnim]

Has anyone actually measured their individual cell voltages AFTER a balance charge.
It seems that all these "4 button chargers" that are everywhere at the minute and basically are all the same - it seems they have a wide tolerance within them as to what they think is "fully" charged.

I have an Ansmann xMove 2.0 which is great and hasnt missed a beat, except I just measured my individual saddle packs which came off the charger - supposedly fully balance charged at 4.2v each (thats what it showed on the LCD display).
However, what they are ACTUALLY sitting at is 4.14 and 4.15

Now this isnt too bad, as its UNDER the 4.2v limit, but it means Im not getting all the juice out of my batteries.
More worringly, is if my charger had been even 0.1 OVER that limit (eg. 4.21v) this could be dangerous and at very least definately lessens the life of my batteries.

Anyone else either tried this, or willing to try it?
Would be really interesting to try a side by side comparison of different brands and makes.

I know how to fix it, as the charger uses a resistor array to suck volts out of the higher cell(s) when balance charging, and it is these resistors which are cheap and not giving a true Ohms rating.
I can replace them with high accuracy resistors once I work out their values.