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It shouldn’t… I went three months without charging (also not a whole lot of riding, but it should hardly lose any charge).

First thing I’d do is fully charge the battery, then disconnect it (be sure to place a dummy plug in the middle port!) and then check the battery charge level in 2-3 days. If it’s not still at 95-100%, the battery is probably faulty (warranty).

Oh yes, definitely!

The main restriction is that 105 shifters don’t have sd300 or satellite shifter ports.

The only 11-speed di2 parts that’ll work with 12-speed Di2 are some TT/tri shifters and SW-R9150.

BAM! Hi! I'm in a meeting, but here is a quick reply :)

The AD305 is just a 'dumb' port converter, it won't make 11-speed derailleurs work with 12-speed shifters, unfortunately.

There is a 12-speed MTB Di2 rear derailleur, but it's e-bike only. It doesn't have the wireless or junction A functionality like the other 12-speed di2 derailleurs do... unfortunately.

Here it is!
https://patents.justia.com/patent/11685470

Interesting (I thought): the system lets you select a cassette... 9 speed, 10-speed... or 11-speed or more.
(according to the images, I use pat2pdf to get the PDF with images).

And it seems there's also a wireless-but-with-mechanical-cable system, just like Archer.

Right here https://si.shimano.com/en/pdfs/ev/FD-R8150-4863/EV-FD-R8150-4863.pdf ;-)

Part Y2JP98010

Cheat Sheets are done! Finally, hah!

There's a page on them here, but you can also use this link to the main zip file (with all 3 cheat sheets).

https://assets.bettershifting.com/cheat-sheets/all-di2-cheat-sheets.zip

Feel free to edit them and move things around, and put your own logo at the top right if you feel like it. The only thing I ask is that you leave the QR codes / site links intact :)

Sort of... I'll probably change the text, but yeah.. it depends on the model.

6870 / 9070 have an electronic top limit as well as 2 bolts, and you shift to big-big to adjust that, yes.

Newer derailleurs don't have a low limit bolt, and that limit is set electronically by shifting to small-big.... and these also have the big-big electric limit.
(12sp ultegra/da FDs don't have limit bolts at all)

Derailleur adjustment is so 'complex' that I decided to put the actual how-to on pages, and only show how to get into adjustment mode on the 'cheat sheet' - hence the QR code/link.

There's probably room to talk about the different modes in the A3-sized version of the cheat sheet though!

Very nice!

Nice! LOOKing good! ;-)

Thanks guys!

Yeah... there's "a bit" of work involved every evening, once the kids go to bed ;-)

Currently working on this "Cheat Sheet".
The 10/11-sp version is sort of done... I'll make the 12-speed version, then double check the 11-speed one... and then make them pretty.

And make all the relevant links/pages on the site.
And fix the QR codes.
And also make an A3 version.
And a greyscale version.... ;-)

You mean the bar-end junction box? The EW-RS910? I'd say that puts absolutely no stress on the handlebar at all.

Yeah, that makes sense - you can then easily disconnect the front of the bike :)

Hah, I've also posted in the other thread just now, but yeah... personally I also avoid the JC130 Y-splitter.
I don't use an extra SM-JC41 up front though..

My 11-speed bike was set up like this:

And yes, you lose one port and some flexibility, but it looks nice :)

Yeah... like others have said, if possible I'd also route the wires through the handlebar (internally). I have never used holes near the drops :).
(Easton EC70 Aero, Pro Vibe Aero)

On my own 11-speed bike I didn't use the Y-splitter either. You lose some flexibility and one e-tube port... but it looks better than having that y-splitter/JC200/WU111 dangle in front of the head tube (on my bike).

That long wire is drawn above the handlebar, but it's all internal:

Thanks - that sort of thing was my guess. Will maybe dismantle for the fun of it.
Annoying as can only justify replacing it with ultegra which doesn't look nearly as nice.

There's a guy in the UK that repairs front derailleurs and rear derailleurs. He can probably tell you whether or not it can be fixed.

His name is Pawel Niewiadomy (https://www.instagram.com/paweln83). I've had more luck contacting him on facebook though. He also posts in the 'Shimano Di2 Forum' group on facebook (not my group, but I am a moderator): https://www.facebook.com/groups/shimanodi2

Thanks! :)

Yeah, I'm just one guy - and cycling isn't my day job :).

I started the site because I tried to build a Di2 bike and couldn't easily find Shimano information/tutorials. Besides the dealer manuals there was only Carlton Bale's page (https://carltonbale.com/shimano-di2-everything-you-need-to-know/).
It's a great resource, but it's just one page.

So yeah... I started to decipher Shimano's manuals and translate them into a bit more human readable formats... and things took off from there.
I work on the site every evening. Sometimes more than others, but the goal is to make it that 1% better every day.

It took me a while to figure this out, but my goal with the site/instagram isn't to make money, and I'm not trying to turn that into my main source of income. That allows me to focus on actually helping people and I don't have to post things like "These five things Shimano doesn't want you to know!!1?1". Sure, there are some affiliate links on the site, but they're not all over the place . No ads either, and there never will be :).

Shimano (EU) and PRO do help out - I have some great contacts and they gave me access to their TEC platform. In the past, Shimano has sent me parts (RD-R8050/DA cassette/FC-R9100-P, rotors, etc.) and let me take home a Wilier Filante SLR with 12sp DA and their C50 wheels (for ~5-6 weeks).

I'm trying to get my hands on a 105 Di2 bike, because that'd be fun. Also interested in their e-MTB "free shift" and "auto shift", but when I visited Shimano EU last month they only had three e-MTB demo bikes - and all were out at dealers/conferences/etc.

At the moment I'm taking apart a (broken) RD-R8150, working on the Di2 'cheat sheet', and will install 12sp Ultegra on my bike next month.

Hi! Ask me anything :)
(and Hi Swedeee! I've seen you before, but don't remember where:))

I run BetterShifting.com