Try the following in Terminal Console App: su> enter than bc> enter.
This starts a battery calibration tool. Charging before the battery to 100%, and let the charging cable plugged in.
Read the text of the tool below!!!
After the start of the calbrierungs tool give in the following: a > than and tap enter again.
Automatic calibration starts.
After 20 minutes there is an automatic restart.
Now start bc tool again and see what it says. when you finish deduct the cable and check mAh status. This should be more than 4.150mA.
Hope that helps!
Thanks. I will try that. I did run bc before but didn't do the automatic option.