I am kind of missing my Nexus One which i used for almost 2 years. I retired early this year. Its battery life compared to another phone (iPhone 3gs) also got 2 years ago was horrible. I remembered I called tech support and they have sent me a new battery which was no improvement. I got one of those extra batteries so I dont have to worry about running out of battery. I've got many OEM and some extended batteries, and I thought the 2500mah mpj one cost most effective. The extra juice provide my phone 2-3 hrs on battery life.