Don t give up to easily. I can highly recomend the Garmin GPSmap60C. Ive been using it for the last 2 months through West Africa, and its behaved faultlessly.
No coverage problems anywhere, it comes with base map as standard showing some major roads, all major towns, and about every second or third village in Senegal and Mali(some are just a cluster of mud huts). Very accurate generally, but in a few rare cases it shows you travelling 10-20kms off to the side of the road. Nothing that a little dose of common sense can t correct.
Im powering it off a motorbike, but the AA batteries seem to last about the 40 hours they say in the manual.
Loads of memory as well.
Be carefull about buying a cheap one off ebay. It may come with the base map detail biased to the US.
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