
I've learned the hard way that it's always a good idea to carry a spare laptop battery. I'll be sitting in a coffee shop without a plug-in, nearly finished some website edits for a client. I'll be uploading the files to server by FTP for final testing and the computer decides it's time to hibernate. Grrr!!!
I always travel with a spare battery. One I charge overnight and the other one I put on the charger before leaving the hotel for the day's excursion.