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Road Bike Frames, Wheels & Components / Re: LTWOO ER9 & ERX - Electronic groepsets
« on: December 07, 2025, 05:21:38 PM »Hi,
my ER9 groupset is not working anyone, it is completely dead. In the morning everythings was working. At the evening no response, nothing. I checked the power of both batteries and the wires, everything looks good.
Has anyone else had this kind of error?
BR Markus
I'm having a similar issue with my eR9. Initially the issue was that it did not charge when plugged in. The battery is now dead - I tried removing the cells and charging them separately, but once the cells are removed and reinstalled they need to have the charger plugged in to activate them, so I still have an inactive system.
A new front derailleur did not fix that issue, nor did new cables or a new battery.
The derailleur and cables were sent by the ltwoo store trying to sort the issue and the battery case I bought from another aliexpress store to try and accelerate the process because each item they send takes a good 2-3 weeks to get here.
They're now talking about sending me a new battery, despite me telling them I have already sourced a second battery that did not fix the issue.
