Lenovo S10-3t is a convertible netbook that can work in both tablet mode and normal netbook mode. While most netbooks nowadays mostly come with 6-cell battery, the Lenovo S10-3t is available with 8-cell battery that offers up to 10 hours of battery life. The battery is really huge and sticks out from the back of the netbook. You can get one from
NewEgg for $499.
Top Rated Netbooks
Last updated on: May 2012
#1: Samsung NF310-A01 86% 
#2: ASUS Eee PC 1015PEM 84% 
#3: Toshiba NB505-N508 76% 
#4: Toshiba NB305-N600 76% 
#5: ASUS Eee PC 1215B 71%