Battery in my DV6500z completely loses charge in days

Hey all, I bought an HP DV 6500z laptop in november of last year, its been pretty good so far, but more and more I noticed that when I would charge my battery to full, when id come back to it, it would be significantly depleted even though it was off for only a few days. It got so bad that I would completely lose a 100% charge on my battery after 5 days, I tried everything I could think of, from the charger being properly plugged in, to me maybe putting it in hibernate and not noticing, but I covered all the bases and the problem still continued.

So I took it to circuit city, they service hp's under warranty, and I had them order me a new battery, I recieved it and got it all fully charged up, depleted it and then charged it to full 100% again. That was this thurday, I turn it on this Sunday morning 3 days later, and its at 50%. Do you folks have any idea whats going on here, I refuse to believe this is normal or acceptabe, my other laptops never acted like this with batteries. Any thoughts?

 

I know that it is normal for batteries to lose charge over time, probably not that much but try run a battery check (start-help and support-troubleshooting tools-hp battery check) and see what that says. Also make sure that you have the computer off and not in standby (i know you probably know that, but just to be sure)

 

A BIOS update, will solve this. Also, you need to know that your laptop's battery has its own processor (caled S.M.A.R.T) with its own BIOS as well (this may sound silly to you, but its true). This needs to be calibrated once every 3 months. You will need to set your laptop to HIGH PERFORMANCE, then discharge the battery below the CRITICAL WARNING level. You may need to turn off the option to hibernate or sleep, when you are doing this.

 

Just lett he battery run down to the critical cut off point which is 5% if i remember correctly. Then charge it back up to 100%

This is called calibrating/cycling. I recommend you do it twice and see how it goes..

 

Ok, I will try a BIOS update, how do I do that?