there are any files you need while on the plane, copy them to your hard drive before you leave so they don't affect your battery life and therefore the time you can spend online. In the same ways you don't want your internet connection multitasking for the purposes of saving bandwidth for the task at hand, you don't want to multitask for the sake of your battery life. The less you're running and doing in general is better. Consider making a separate account or using a guest account if you're just planning on doing some light browsing. While you won't have access to all your settings, you won't have to worry about tons of apps draining your battery. You can just open your browser and a few other programs you won't to use. In the event your battery does die, be ready with a backup. This doesn't necessarily mean a backup battery, however, as Mac users don't exactly have that option nowadays. Taking a tablet along with you is often a good alternative. Just do anything that requires a laptop while your battery is good and full and switch to the tablet once the laptop's battery runs out. If you signed up for an account (or logged into one you already have) before purchasing your Wi-Fi pass, you should have no trouble transferring it to a new mobile device. (At least, I haven't with GoGo.) While this isn't as ideal as having a never-ending laptop battery, it's a good alternative