Continuing evidence that Google Glasses' Biggest Flaw is the LCOS Display, short battery life and heat: Google Glass & Future Pharmacy Uses

"Some developers were disappointed by the limitations of the Google Glass. Battery life is said to be about 5 hours, however, based on personal experience, the battery life actually only lasts for about an hour and a half, at its best. Not to mention, the Google Glass overheating easily."

http://www.drsamrotation.com/1/post/2014/05/google-glass-future-pharmacy-uses.html