Ultegra Di2 battery life problems
I purchased a new Cervelo P3 (2014) Ultegra Di2 in April. No problems with Di2 until a few weeks ago. I could easily go 500-700 miles between charges. A few weeks ago the battery went completely dead 3 or 4 days after charging with hardly any riding. The first time i didn't think much of it and just recharged the battery for my ride the next morning. This happened again a few days later and I took it to my LBS where i purchased the bike. They ran a diagnostic test on the Di2 system and other than a few firmware upgrades everything checked out fine. So, I got the bike back 4 days ago with a fully charged battery, road it about 30 miles 3 days ago and this morning battery is completely dead again.
I bought this bike for IM Louisville (Aug. 24) and I have to ship it on (Aug 15), 6 days from now. My LBS techs have been helpful but i am nervous that they really don't know what the problem is. I've reached out to them again this morning and they got back to me. He seems to think its a problem with the system not going to "sleep" like it should when not in use. He's going to contact Shimano.
The bike was brand new, no accidents, its been stored inside, etc. there is no clear reason that I can think of as to why something would have gone wrong. At this point, given that I am running out of time I think my LBS just needs to replace any and all of the Di2 components that could be the problem. I think Shimano has a 2 year warranty on their components to hopefully this won't be big deal.
Has anyone experienced this problem? I will be calling Shimano obviously but any other advice is greatly appreciated.