[iPAQ] Battery Problems

I have an IPAQ 5500 with 2.4.19-rmk6-pxa1-hh36 and opie 1.1.6. Everthing is
fine, but suddenly the behaviour of the battery applet is different. The
battery is fully charged (applet 100%, and the orange light stops flashing)
but if I removed the IPAQ from the cradel the battery-time-remaining is only
between 10 to 13 min. After 13 min the applet says to me the battery is empty
but I can use the IPAQ about 2 more houres with full backlight.

So what is wrong? The applet or is my battery broken? (I bought the IPAQ 1
month ago)

If the applet is wrong, what can I do to fix it.

Here is the output from /proc/asic/battery
Battery Monitor
  Voltage : 4204 mV
  Active current : -1 mA
  Accumulated current : 80 mAh
  Temperature : 27.625 deg C
Local calculations
  Local TAD : 188200
  Last ACR update value : 272
  Is learning? : no
  DS2760 updates : 784
  Full level : 81 mAh
  Derated full level : 81 mAh
  Empty level : 15 mAh
  Percentage : 98
  Lifetime : 3900 min

and from /proc/asic/ds2760

Battery Monitor
  Protection : 0x43
  Status : 0xe7
  EEPROM : 0x3c
  Special feature : 0x3f
  Voltage : 860 (4199 mV)
  Active current : -1 (0 mA)
  Accumulated current : 272 (80 mAh)
  Temperature : 221 (27.625 deg C)
  Charge capacity by temperature : 47 66 79 82 87 (mAh)
  Last learn cycle count : 120 (cycles)
  Total accumulated discharge : 188200 (mAh)
  Charging breakpoint : 255 (mAh)
  Charge time breakpoint to full : 255 255 30 (min)
  Charge time empty to full : 224 255 255 (min)
  Cell chemistry : 0
  Manufacturer : 1
  Rated cell capacity : 1350 (mAh)
  Current offset : 0x00
  Sense resistor : 84 (21.00 mOhm)
  Manufacture date : 1044884004 (seconds from 1970)
  Original capacity : 1350 (mAh)
  Active empty level by temmp : 50 34 24 12 0 (mAh)

Thanks Michael

-- 
Michael Sexauer
Augartenstr. 20
76137 Karlsruhe
msexauer_at_web.de