Battery life of smartphones is something we all wish was better. Especially ones like the Samsung Galaxy Nexus with a huge screen and 4G LTE. Last week I had the pleasure to test the Mugen Power extended battery for the Galaxy Nexus coming in at 3900 mAh -- a huge improvement over the stock 1750 mAh battery. I wanted to see if it would last the entire weekend. Read on below for my full results and plenty of pictures.