I love my Nexus 7. It's one of the best tablets on the market for the money. Recently, Google updated it to Android 4.2.1 Jelly Bean and brought with it irritating lag! That lag presents itself at the worst times. Another issue I wanted to address was battery life. Although the battery on the Nexus 7 isn't small, in my use I needed another hour or two of use. Investigating solutions that would address both lag and battery life, some of our readers recommended Franco Kernel, a replacement kernel, kernel updater, and settings control panel all-in-one. It won't work with every device, but if ...