Hi, every body im Ali ,i have lenovo z510 ideapad for one year ,now the problem is the battery is crashed!.enytime i turn the laabtop it shows batery weak you have to change it ,i want to buy new one but there is no battery matches whit this model of Lenovo I i searched every where but as i said ,nothing ... " so please every body reding this help me to find new one i really need it " please answer .thanks