Power info. inconsistent

Question

Sometimes, my PowerBook's battery doesn't last very long (10-15 min.). It doesn't show a low battery warning any more. Every time, when I check, the info. under "Power" are different. The 'condition' has always been "good", but charge numbers and cycle counts are different. For instance, the Full charge capacity were around 3000 or 1200. The cycle count used to be 320.
I just calibrated it and I got the following info.
Charge Information:
Charge remaining (mAh): 602
Charging: No
Full charge capacity (mAh): 606
Health Information:
Cycle count: 0
Condition: Good
Battery Installed: Yes
Amperage (mA): 0
Voltage (mV): 12436
System Power Settings:
AC Power:
System Sleep Timer (Minutes): 10
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 10
Dynamic Power Step: Yes
Reduce Processor Speed: No
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On LAN: Yes
Wake On Modem Ring: Yes
Display Sleep Uses Dim: Yes
Battery Power:
System Sleep Timer (Minutes): 5
Disk Sleep Timer (Minutes): 10
Display Sleep Timer (Minutes): 1
Dynamic Power Step: No
Reduce Processor Speed: Yes
Automatic Restart On Power Loss: No
Wake On AC Change: No
Wake On Clamshell Open: Yes
Wake On Modem Ring: Yes
Display Sleep Uses Dim: Yes
Reduce Brightness: Yes
Hardware Configuration:
Clamshell Closed: No
UPS Installed: No
AC Charger Information:
AC Charger (Watts): 65
Connected: Yes
Charging: No
Second issue is after the battery was drained then recharged, when I power on, the following message would come on:
"Your computer's clock is set to a date before March 24th, 2001. This may cause some applications to behave erratically..." When I check the 'Date and Time', the clock is set correctly.
The keys don't illuminate any more.
Do these problems all related to the battery?
Has anyone used Rayovac RAYLT1024 on PowerBook G4 before?
I would appreciate some advise. Thanks.

Answer 1

thanks for the quick reply !
I saw an article in the local newspaper's Business section regarding Batteries Plus company and its retail stores. On their website, it listed RAYLT1024 as the battery as fit replacement for my PowerBook. Do you have any comments about this Rayov battery?