after few more days of using this script i can say, that the method used for calculating percentage should be set as system default..
When the system meter reached zero, i still had almost 8 % left, and phone doesn't look like powering off at all. I didn't wanted the battery to drain completely as mine is more than one year old, and i really don't want to try whether it will survive that .
Just one more thank you for the good job. And by the way, if you know of a way, how the system battery meter (in the upper menu of desktop) can be "calibrated" with this script, please let me know. Meanwhile i will try to also find out if it is possible ...
-M.