Does anyone have any suggestions for a good external power source that can fit into a top tube bag to power a Garmin for longer rides? The Garmin battery lasts for about 10 hours and won't last for a 200km+ ride.
I like the Garmin batteries, they strap to bars nicely, but are expensive and there's higher capacity options now in the form of Anker and Zendure.
@hippy started
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Does anyone have any suggestions for a good external power source that can fit into a top tube bag to power a Garmin for longer rides? The Garmin battery lasts for about 10 hours and won't last for a 200km+ ride.