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  • Does anyone have any experience using external battery pack with their garmin 800? I need to make mine last ~24hrs.

    Garmin seem to sell an external pack for about £60, but does anyone know of any other options? Or have any general advice?

    There are a few out there and they all work well. Maybe £30 at the most. I remember that I could not make the Garmin brighter in the evening the first time I used it. Diagnosed the reason for this and all fine on day two. Now of course I have forgotten again.

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