Batteries are 300 cycle rated so if you used these on battery power daily, in 2 years you would need a new battery on almost every laptop today. That is, no laptop (battery) will meet your goal.

However for not much the current #1 seller on this list http://www.amazon.com/Best-Sellers-Computers-Accessories-Laptop/zgbs/pc/565108 would be fine for writing and Netflixing. It's all of 250USD so no budget buster.

Yes, we have a similar CPU+RAM laptop at home. An Asus x200ca. It's fine.
Bob