I'm getting about 5-6 hours, but I'm doing a lot. I have seen a decrease, but it seems normal. I have been testing it since April, and I am used to it.The estimated time remaining has definitely dropped - a lot. It is showing 4 hours remaining at 99 % battery. Used to be 7-8 hours in Show Leopard.
I have not yet tested to see if that estimate is accurate.
What are you getting?
If your computer supports it, it will choose the best option for you.one thing i noticed about osxL is that it, by default, boots your system into the most power usage state, aka, the more powerful video card on board. definitely will put a dent in battery life.
Battery usage is always tricky, but no one is seeing battery life cut in half. It can be measured but no review can tell you how well it will hold up to "your" daily use. As they say the 10.7.1 update will fix everythingI am used to viewing screen brightness on the second tickmark above off. i get easily 8 hours of heavy usage on my 2010 mbp with snow leopard. if lion axes that to 4 hours like windows does then im staying with snow leopard.