Pick one or two of these up, throw them in your bag and suitcase, and forget having to worry about running out of battery power while on the road. (pcworld.com)
You might also want to connect it to a charger to ensure it doesn't run out of battery power halfway through the update. (howtogeek.com)
The controllers seem to run out of battery life in 24 hours, even when they and the console are off. (zenofdesign.com)