IIRC the garmin battery is about 1000 mAh, so get an Anker battery bank based on that. The smallest are approx 3500 mAh. https://www.amazon.co.uk/Chargers-Anker-Accessories/s?ie=UTF8&page=1&rh=n%3A340327031%2Cp_4%3AAnker
While we are at it do you have any idea how to stop my Garmin 800 going all screen bright when it recognises or looses external power?
Unfortunately no. Could try put the display settings to night only. But that is only a guess
The 1000 does the same thing. It's fucking stupid. Maybe if we all email their support desk they'll actually fix this stupid issue.
@fussballclub started
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IIRC the garmin battery is about 1000 mAh, so get an Anker battery bank based on that. The smallest are approx 3500 mAh.
https://www.amazon.co.uk/Chargers-Anker-Accessories/s?ie=UTF8&page=1&rh=n%3A340327031%2Cp_4%3AAnker