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Get some 14430 lithium batteries and have at it yourself? Or go fully custom with bigger capacity batteries like 18650?
exampleEdit:always buy batteries with soldertags so soldering is actually possible.
Grumpy_Git
PhilDAS
I think my battery has died.
Ultegra R8070
Last few rides, shifting has been intermittent. Pressing the button several times eventually gets one shift and then finally the other day nothing, completely dead. No lights on the junction box, charger doesn't light up when plugged in.
Swapped the battery wire, no change. All connections are checked and solid.
Anyone had the same? The battery has 2015 written on it so I guess not bad going but a bit annoying as I've only had it a year myself and they aren't cheap