Ultegra Di2

[WelshNinja]

Hey guys
Not sure if I'm in the right thread. But I went to go for a ride this morning after charging my battery last week and it was dead flat. Ok. Put it on charge all day. Put it back in bike. Still dead flat. I'm stumped
Any suggestions?

[Duck!]

What's your charge routine like? Do you top it up frequently, or wait until it's really low before recharging? There's a really good thread somewhere about charging schedules for various battery types, but in short, lithium-based batteries (used in many Di2 as well as many lights) do not like being run really low before charging on a frequent basis, but conversely actually need a deep discharge occasionally to keep them working properly. It's also not a good idea to leave it sitting on the charger once it's fully charged. If you do run it right down or leave it sitting on the charger all the time then you'vge probably killed its innards.

[Newcastle Dave]

Had a similar problem with the Di2 on my Omeo last week . Ended pup having battery replaced under warranty by Cell.

[Toyopet]

Does the light go out on the charger, indicating that the battery is fully charged?
If so, it could be due to poor contact at the bike's battery cradle.
Or a broken wire somewhere.

[WelshNinja]

Yes the light goes out on the charger. The bike is only 4 weeks old. I havent really had to charge it. Though I did charge it last weekend, I was surprised to find it flat. A trip to the shop tomorrow I think.

[Xplora]

Warranty time. No guarantee you don't have a dud battery or dud charger. Best to take all of it in for testing.

[Hilly7]

You probably have checked this, but make sure you have not accidentally knocked out your cables from fd and rd

[jillybean]

You probably have checked this, but make sure you have not accidentally knocked out your cables from fd and rd

Also check that you haven't accidently disconnected the shifter cable(s). I had this happen after hitting a pothole with my hands on the hoods - bartape had been wrapped with the cable pulled tight and the extra pressure from hitting the pothole was enough to dislodge the connection.

[neobikes]

if its 4 weeks old take it back to where you purchased it.... They will plug it in to etube software and will tell them very quickly what the problem is... except faulty battery of course but that is pretty easy to establish

[jules21]

1. check the battery level by holding either of the levers in the shift position - the control box will illuminate. it should at least have enough charge to be flashing red to indicate low charge. if it's anything else, then that suggests it is holding charge.
2. as mentioned, check the control cable connections. it may even pay to check the internal connections in the junction box, found inside the down tube. although this is a pain in the a*se.
3. spray terminals with WD40.
4. source another battery (from your LBS?) and confirm that battery to blame.