Samsung Gear S3 update fixes the battery drain and more. Battery life is still the Holy Grail of mobile computing, and a long day at Disney World is a great way to test advances in mobile software. While the new Microsoft Book 2 will last all day and then some, the Galaxy Note 8 Smartphone strains to get through a whole day, and the Galaxy S3 Smartwatch has had a battery drain problem for some time. Software tweaks, however, have solved the problem for the watch, and judicious charging of the phone make the problem tolerable. Until the unlimited power source is discovered, road warriors will have to get used to plugging in whenever an outlet is available. Convention organizers are even making battery charging stations a staple of the amenities offered to participants.