Rand Mcnally 530 heat and battery concerns.

Hello,

I just started driving OTR 1 week ago and purchased a RM530 based on the advice of trainer who has used many GPS' and settled on the RMM720.

I've noticed a few problems related to battery and I was not able to find any info. on RM battery problems.

1. The battery doesn't last very long, mine gives out after 30 mins of daytime usage. Is this normal and and if so are there overcharging problems with always keeping the unit plugged in.
2. The heat, it got so hot that it left an imprint on my plastic binder, had to hold it up to a/c all the way home. I can't even imagine how hot it would get if left in sunlight.
3. It never held a full charge, even when plugged in it would rarely get to 100% (green light) and if it did it would go down and up all the time. I'm just wondering if this is on purpose to avoid overcharging.

I am using a 3.2amp and 1amp car charger with the factory cable, noticed heat on both chargers.

The GPS itself is quite wonderful with many useful features and I was just wondering whether I have a defective unit or all units experience similar problems.

Secondly does the Garmin counterpart to the 530 have similar issues?

 

Appreciate the replies. I'll try to change chord and the truck adapter. If all else fails I still have 15 days to return it so I'll try to get a new one or try out the Garmin.