Just had to return a device to Verizon due to these issues. They said it has to do with certain pins in the charging port, and being to close to the screen, which can happen over time or in refurbished devices. There are forums online that go step by step into how to fix the port if you are...
Switching from my trusted GNEX with 4.2.2 to this, I've been extremely happy with Jelly Bean 4.1.2 on the Maxx. Battery is still exceptional, home screens s and menu's run buttery smooth, and everything seems a lot faster then 4.0.3.
I've noticed battery life increase after a few days with the update. Even with Google Now on, I still get a good 14-18 hours with mid to heavy use during the day.