I purchased a used Di2 setup for my tri bike this year. A friend helped me put it on the bike. The first few rides were fine, but now the battery dies quickly. (Happened on today’s ride)
I fully charged it when I got home. I let it sit for an hour after it was chaged and when I checked the green light was flashing green (less than 75%) and not solid green.
I dont think it faulty wiring. Could it be anything but a bad battery?
I purchased a used Di2 setup for my tri bike this year. A friend helped me put it on the bike. The first few rides were fine, but now the battery dies quickly. (Happened on today’s ride)
I fully charged it when I got home. I let it sit for an hour after it was chaged and when I checked the green light was flashing green (less than 75%) and not solid green.
I dont think it faulty wiring. Could it be anything but a bad battery?
those batteries are pretty robust, it’d be strange for it to go bad so soon. I had the same problem a few months ago and it was a spliced wire that was barely visible - I’d double check!
When I had this issue it was a pinched wire as well. A bike shop can run a full diagnostic to determine if the battery or any of the components are bad.
I had this as well! Bad wire.
Except on my old bike which is di2 1st gen it was actually the battery!
When was the battery manufactured?
I dont think it faulty wiring.
Most people don’t, but more often than not it is.
Could it be anything but a bad battery?
Unlikely, but possible. See previous response.
Yeah, as mentioned in my LP race article – I had a bad junction box that would have bricked the whole system had I not replaced it when I did.
Could just be something that is keeping the system “on” at all times, hence the resultant battery drain.
When was the battery manufactured?
The other possibility, esp. on a used purchase - is that the battery was left fully discharged for a long while. That has a way of killing lithium ion batteries, even newer ones.
Another thing could be that the rear derailleur set screws ate not correct and we have seen battery drains when either the bottom or up set screw is just a little too tight making the system thinking it working continuously so check those as well.
Jeroen
How did you discover that the junction box was no good? I had a race yesterday morning, so I charged the bike fully when I got up for breakfast. I checked the charge level 20 seconds after unplugging it. The light was flashing and not solid.
I am going to switch the battery to my road bike, charge it and see if it fully charges. If it doesn’t well then I think its the battery.
Thank you. Will look at that after I try the battery to see if it holds. charge while on my road bike
Went to the shop to run diagnostics on the system, and the box came back as bad.