Apr 8, 2021
<img src="/styles/default/custom/flags/gb.png" alt="United Kingdom" /> United Kingdom
TomTom Model(s)
go 500
in my car a hyundai i10 is a 5v supply on my dash to supply a phone via a hyundai docking unit. I have adapted it to accept my tom tom go 500. but will not charge the battery when exhausted. I then supplied the docking unit via a cigarette socket for more amps I am told. this way still won't charge the Sat nav. but I only used basic 2 core cable. baffled because power is present at the unit tested with meter any help gratefull regards bill



Dec 28, 2007
Colorado, USA
TomTom Model(s)
GO720, GO740TM Live, GO 1535 Live, Via 1535, Via 1605, GO 52, GO 600, GO 620, GO 630, TomTom Bridge
Your Hyundai will likely only be able to supply 500mA from the port up by the front ash tray. That's insufficient for both charge and concurrent operation of a GO 500. If your i10 is recent enough, there may be one inside the center console, and that one is capable of more current.

That said, a decent cig adapter should have covered it nicely. It does make me wonder either about the charging cable or the battery in your 500.

I'd first try to locate a different cable. Beyond that, you may be in for a battery replacement. It is now probably 10-11 years old. Do you have a mains charger you can use to test it that way -- before we get to talking about battery replacements?

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