I am a student, and want to buy a high quality and cheap battery for my laptop. How to choose?
If you expect your laptop to be dependable, follow what the laptop manufacturer recommended & forget about looking for the snake-oil "High quality but cheap laptop battery." If you use cheap generic batteries you run the risk of permanently damaging the battery-charging components on the laptop motherboard. i_Xp/Vista/W7User
high quality and cheap battery That's what they call an oxymoron. You can have high quality or you can have cheap but you can't have both at the same time.
Stuart
It may be possible to buy an inexpensive laptop battery that is still of good quality, but you need to be careful where you shop. I bought a replacement battery for my daughter's Mac Powerbook 4 from www.freshbattery.com, and fortunately it was a good experience ... great price, free shipping, fast delivery, and the battery is still going strong.