Well, I started using the first mega battery this morning at 0900 PST - I am still using that same battery 7.5 hours later. Since I am getting ready to leave work for home, will let you all know in the morning how much longer it worked. But so far, I'm loving it. My normal batteries lasted anywhere from 2.5 to 3 hours. The mega battery has more than doubled that. 
Kaye

Kaye