Sounds like a good idea. Just one problem --> "Perfect to Keep Hands Warm Either on 12, 9 or 7.4 Volts" -- so where do you put the battery/batteries? I don't want to be riding with loose wires dangling all over the handlebars.
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The Lord is merciful and gracious, slow to anger and abounding in steadfast love. - Psalm 103:8
I am a cyclist. I am not the fastest or the fittest. But I will get to where I'm going with a smile on my face.