I have an old Toshiba laptop (pentium 4) whose battery just crapped out. Looking at the battery, it says it's a
PA3251U. Looking online, this thing is going for about $100! I don't want to spend probably 50% of this machine's value on a battery replacement!
My question is: what makes a laptop battery specific to a model? Do I really only have this one battery to choose from, or can I look for any battery that matches some certain attributes (like number of cells, voltage, etc)?