It isn't electronic interference given it is for an entire ride over hundreds of miles and I've reset the straps several times. And, I use gel on the strap. Hopefully, it is only the battery.
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-\Brian
18' Landshark Tandem - Custom
15' Wabi Special Single-Speed Road
06' Cannondale Six13 TeamOne
06' Cannondale Prophet 3 "Lefty"
92' Trek 5200