I cannot keep the unit working for more than 11 or 12 mins. on battery power when the screen is at full brightness, even though the unit is advertised to work on approx. 30 mins. This occurs with and without GPS lock and with the network turned off. With minimum brightness, I can get closer to the 30 mins. Any suggestions? (Tests were done several times after a full battery recharge, ie. hours or overnight).
Question: Is the 30 min of battery life supposed to be at min power or at max power? Also, after turning the unit off, the screen brightness returns to full bright. Perhaps returning to the last setting would be beneficial.