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Discussion Starter · #1 ·
Di2 battery mount problems. I just installed a new di2 group on my P3. After the install there was nothing, no power and would not shift. I narrowed it down to the battery mount. I replaced it with the one off my wife’s bike and it worked perfectly. I ordered another new one and still the same thing, but this time it will go into crash mode. I installed that one on my wife’s bike and it does the same thing, only crash mode. Both bikes work perfectly with her battery mount and both bikes will not work with the other new battery mounts. I just ordered a 3[SUP]rd[/SUP] one. Is it possible I’ve bought 2 new bad mounts? Or am I overlooking something? Thanks in advance
 

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4,963 Posts
you are overlooking updating the firmware.

the battery mount is the brain, without it updated the system won't work.
 
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