How long does the battery last?
It all depends on the brightness level you use during the tournament. We have seen roughly 8-15% drain during a two day tournament with G90 with a 5 second delay. During a two day G90 with a 30 second delay it was about 15-20% drain. If you are running low, the operating system will automatically activate the battery saving mode as well. One thing to note about the Motorola Nexus is it has a very large 3220mAh battery. Motorola claims you can get 6 hours of charge time in 15 minutes or 8 hours of charge time in 15 minutes with the turbo charger.
if you are concerned about battery life, you can always purchase an external battery pack from places like Amazon, Wal-Mart, Best Buy or eBay.