I only used this product for 10 hours of cycling. The battery shows about 50% of the original charge. It works well outdoors, but I did notice a slowdown when driving under heavy branches (the display showed about 10 mph when I knew I was going at least 15 mph). The handlebar mount is a more modern 30mm style; It does not drag on vintage 23-24mm bars. A rubber seal is required to compensate. Currently I'm using a small mount that attaches with a strap. So far I am satisfied with this device.
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