chance are its not the battery!
make sure green light is on the car charger and let it plugged in for
awhile, then hold the power button (upto ten seconds) until it
starts..if that fails
the following magellan
800,860,2000,2200t,2500,3000,3050,3100,3140,4000,4040,4050 and the 6000t are known to have
faulty dc connectors...if your magellan gps
is not charging or will not power up, its most likely the dc power
port...i sell these power ports and will repair them for anyone thats not
able to do it themselves.
you can get it repaired
here
or buy the port
here
if you need further help, just let me know