I have a dedicated GPS for my motorcycle, but I use a RAM X-mount in my van. My son recently purchased a knock-off X-mount for his scooter. It is actually better than the real thing. It grips much tighter, so you could probably get away with not using that rubber band thing. Plus, it has a USB charger built in.
https://www.amazon.com/gp/product/B0...?ie=UTF8&psc=1
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