I have completely followed this walkthrough, but my computer is still shutting down at 3%. The advanced setting for critical battery level refuses to allow me to set this under 3%. My laptop battery is getting a memory and is losing 1% total every recharge. My BIOS does not have any settings for this/is not configurable.
I decided to test how bad it is to fully discharge a Lion battery that can "get no memory" on a previous laptop I was using last year that would only charge to 5% and had a runtime of about 10 minutes.
The laptop has been unplugged for over a month, and I just started recharging it yesterday. To my surprise after about 30 minutes it already had a 15% charge on it. I just checked back on the progress after it was going up and up, and it is now 100%! (So if a full discharge damages it, this is an odd case, since I now have a battery that is like new!)
That system was running XP and had the same issue where it would automatically shutdown at 3% so I could not fully discharge it. Until I let it naturally drain that last 3% by leaving it unplugged, did it finally get to ZERO. I am now starting to wonder if the guides and advice out there are actually correct, because that was a Lion battery and I can tell you, it indeed had a memory.
Has anyone actually fried a Lion battery by fully discharging it to 0%?
Most likely I am going to try the same thing with my current laptop, because I have lost another 6% (in memory) since I started this, believe it or not.