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I hooked up my new Nuvi 500 a month ago, knowing that the LED on the power cord would produce a slight drain, but I didn't think it would be much. I put the battery tender on the bike and left it for a month. Today the battery was completely dead. It was down so far that the battery tender couldn't sense the 3 volts it needs to activate, so I was getting the flashing red light disconnect signal from the tender. Interestingly, the Nuvi was also completely discharged.
I pulled the fuse on the Nuvi and put my car charger on at 2 amps for long enough to get the battery to recognize the tender, which now indicates it's charging. Someone on here earlier posted that he ran a voltmeter across the GPS connection and found no detectable draw.
Unless there's something else going on, it appears that the GPS power cord is pulling enough to overcome the normal 1.4 amp charge of the battery tender. I don't see how an LED could do that. Does anyone have an idea?
I pulled the fuse on the Nuvi and put my car charger on at 2 amps for long enough to get the battery to recognize the tender, which now indicates it's charging. Someone on here earlier posted that he ran a voltmeter across the GPS connection and found no detectable draw.
Unless there's something else going on, it appears that the GPS power cord is pulling enough to overcome the normal 1.4 amp charge of the battery tender. I don't see how an LED could do that. Does anyone have an idea?