You didn't answer my earlier question regarding how old your computer and/or battery is.
The reason why I asked how old your computer/battery is & how often your battery needs to be recharged (if you run it on battery power often or not)...is because I have read in various places that rechargeable batteries are good for something like 750-1000 recharge cycles.
The closer the battery gets to this max number...the shorter the amount of runtime (hours & minutes) you get when running on battery power.
A rechargeable battery when it's new has a maximum charge capacity measured in milliamp hours.
So let's say your battery when:
- brand new has a 5000 milliamp-hour capacity (mAh)...and has 5 hours of runtime
- after 100 recharge cycles, maybe the battery's maximum capacity is 4500 mAh, and a runtime of 4.5 hours
- after 500 recharge cycles, battery capacity may be down to 3000 mAh...and a runtime of 2.5 hours
- finally after say 800 recharge cycles, the battery capacity may be down to 1000 mAh, and last only an hour.
In all of the examples above...the computer will show that the battery is charged to 100%...but because the battery's "charge capacity" decreases over time, the runtime decreases as well.
So the runtime you get with a 100% battery charge when a battery is new will not be the same (hours & minutes) as a 100% charge when a battery is say 2-3 years old...and been recharged 600 times.
The point I'm making is...the older your battery & the more times it has been recharged...the less runtime (hours & minutes) you will get.
To see how much charge capacity (mAh) your battery has, download & install this program:
coconut-flavour.com - [coconutBattery 2.6.5]
Hope this helps,
- Nick