07-16-2013 03:25 PM
Upon checking the lenovo spare parts website (http://www.lenovospareparts.com) and other battery merchants via google search, they don't seem to carry the 9cell / 12cell high capacity battery for the Lenovo Z575. This is most likely due to the fact that although higher battery cells will fit and be 100% compatible, they are much larger in size and the battery may lift or stick out at the back of the laptop as the battery compartment is designed only for a 6-cell 4400mAh.
07-16-2013 03:43 PM
07-16-2013 11:09 PM
Abt 3 yrs ago, I had another Lenovo - dead battery after 2+ yrs. So, I needed to buy a new one & found a 9-cell battery that gave me around 4-6hrs of power. It did indeed protrude out the back about 1.5", but was never an issue for me.
It worked great until some b!@#$rd stole the laptop....joke was on them though - the keybooard typed whatever it wanted & was on it's way out. BTW, that was a great computer b/c it took so much abuse.
Anyway, I know that somebody sells longer-life batteries....they are just a pain to find.