Di2 Power drain issues

[Lovey1]

Help! I have a Canyon Ultimate with 6770 10 speed Di2. In the last year i have been needing to charge the battery every week to avoid the risk of a flat battery as frequently i would plan to go for a ride and find the battery was flat.. I finally got round to replacing the battery last week (at great expense), updated the firmware and went to go for a ride ...FLAT BATTERY!!
I am thinking I must have a battery drain issue. The battery and cables are internal. Any thoughts on what may be causing this?

[BrundanBianchi]

When the bike is stored, are you sure there’s no way the buttons or levers are being pushed to the point they activate the system? This is a great way to end up with a flat battery.

[Lovey1]

BrundanBianchi said:

When the bike is stored, are you sure there’s no way the buttons or levers are being pushed to the point they activate the system? This is a great way to end up with a flat battery.

99% sure thats not the case. I had a similar thought so checked. However that was with the old battery so will check again. thanks

[Gareth79]

A while ago I saw a derailleur for sale which had a power drain issue, so it may be something internal possibly.

This page has some tips on diagnosing issues - updating the firmware is definitely the first thing to try. (edit: oh you tried that)

https://bettershifting.com/how-to-troubleshoot-di2...

If it drained in a week then it should be fairly quick to find the problem by elimination - just fully charge the battery now and then unplug both derailleurs and check the charge tomorrow. Then unplug the shifters, if it's none of those then it'll be a junction box or wire. If it is either then unplug the shifters or derailleur separately to find which.

Edited by Gareth79 on Monday 3rd August 11:37

[esuuv]

Derailleur limits maybe? if one of the limit screws isn't letting the derailleur shift properly the motor will be pushing the whole time - can be front or rear, maybe took a knock somewhere - worth a look - sometimes if you get close you can hear it when it changes.

[Lovey1]

Some great tips here. i will get investigating. Thanks