I'm with you. I need more than 50% brightness to read the screen. When I contacted Garmin Chat about this problem I was told that this behavior is by design and that I should disable Battery Save Mode if I want more than 50% brightness. Since the entire unit is useless to me if I cannot read it, I have no choice but to disable Battery Save Mode. So now, the entire unit becomes useless to me because the battery dies before my ride ends.