Cheers for the replies
I inherited as part of a heli sale so hadn't done any major research into the units reliability until I arrived back on terra firma...
Not too impressed with the internal batteries failing with no prior warning. Also been told that the turn on knob sometimes loosens from its spindle so mid-flight it either falls off or you cannot turn the unit on or off on the gorund, which in turn drains the batteries.....
If anybody wants to buy a shiny Skymap IIIC that needs fixing (has 11/06 database installed) then PM me. Its up for grabs. I say shiny, but its not brand new. And the screen is a dark shade of black even when switched on! Complete with AC adapter and PC connection cable.
I'm off to the 496 shop.