It's possible that something is using up resources on the system and so draining the battery, but if the notebook is otherwise running well when on battery power. then I doubt it is that. It looks like just the batteries.
How old are they? Eventually batteries wear out, and require repeated charging. Perhaps that is the case with yours?
There is something else about rechargeable batteries which is controversial, and in any case may only apply to older type rechargeable batteries, and perhaps not to the newer Lithium/Hydride ones. The problem is "memory charge", and goes like this;
If you get a new set of batteries and do not fully discharge them before putting them on the charger for the first time, then the amount of charge remaining in the batteries is lost once you recharge them. Subsequent recharges will only recharge partially, from the level of that first recharge. For example;
1] Battery is 3/4 empty. It is placed on the charger and when it is fully recharged only that 3/4 of the original full charge is available. Subsequent recharges will only recharge back up to 3/4's, whether or not there is no charge left.
2] A battery is fully discharged and is empty. When recharged the whole charge is recharged and is available for use. Subsequent recharges will supply a full charge, even if the battery is not fully discharged.
Like I say it is controversial, but some recommend fully discharging batteries before recharging them. In fact, I have just purchased a new set of cordless phones for my home, and the manual recommended I discharge them all before connecting any of them to the charger.
I'm not sure, but I believe Lithium/Hydride batteries may be different.
I own an HP Pavilion dv2615tx Entertainment Notebook and my battery is a 6-cell. Recently my laptop has been acting up, as in my battery meter tells me its 80-90%, then during that time my laptop goes dead. And it's only been on for 20-30 mins where as the battery life of my laptop is at least an hour and 30 mins. Then when I put it on charger the battery meter tells me it's like 30% after waiting for an hour or so, then jumps to 100% fully charged.
Is something wrong with my laptop, my battery, or is it the work of a virus...If it's the latter what sort of virus is it and how do I fix it?
Please help me!