Thanks Izzy I had checked for updates for this unit and there were none. It already has the hot fix anyway. The processor speed and fix is very fast, and what kills me is when you plug it into solar or vehicle power, the screen is very significant difference in being able to read it both day and night. My question would be is this a power issue by the batteries not supplying enough power, or is it a software restriction that while on batteries to make the max brightness XXX. I may try a set of Lithium or higher current batteries to see if it hogs up more power. I have been experimenting driving with it on batteries and I get between 3 to 4 days before recharging on my normal driving. I haven't had a chance to get it in the woods yet to see how it tracks and battery longevity, it definitely works great under heavy canopy and places I have gone so far.