Di2 Ultegra charging query.

[Dave B]

Originally Posted by robt57

I find myself wondering if that red molex connector does not have a purpose in the DIY plan there.

I suspect what you have is electrically correct if implemented as intended DIY or not.

No Shimano engineer is going to say that is correct.

If you happen to be in the PDX, I have the port tools. You could just look at the battery to see what it is. But I'd bet it is BTR2.

I've cobbled about every part of Di2, sans charging stuff.

You do have 6770 ST shifters FWIW. these are the 10 speed origs. I have some of those in use still.

I have looked for ANY place to plug that in. Now I suppose I can pull the seat post and dig out the battery, but does anyone have a suggestion on how to install something to charge the battery outside of the bike? If so, what do I need.

This is the only Di2 I have or will have. I have EPS V3 and not only was it a sinch to install, set up, and charge.

Shimano has never given me fits and is wicked easy to make work. I just don't know what else I need if in fact the seller said this was it.

Thanks for all help though if I get frustrated, run over the bike and forget to show appreciation.

[Dave B]

Originally Posted by AngryScientist

disclaimer: i dont know anything at all about Di2, but am familiar with electrical troubleshooting of all types.

when you say you have never seen the battery...

i would think the first thing you want to do is pull the seatpost, locate the battery and verify it is connected to the rest of the system.

yes agreed. The bike came to me charged, worked and I have done nothing but hang it up. I suppose in some sort of strange twist it could have come unplugged some how, but nothing I have done with the bike would have loosened those connections as they are on there pretty snug.

[robt57]

Can't rule out anything until you rule out everything I always say.

Did you get to ride it at all yet I guess is a good question? In shipping a tight wire and a loose battery could certainly = the plug popping out of the battery.

Originally Posted by AngryScientist

disclaimer: i dont know anything at all about Di2, but am familiar with electrical troubleshooting of all types.

when you say you have never seen the battery...

i would think the first thing you want to do is pull the seatpost, locate the battery and verify it is connected to the rest of the system.

[Dave B]

Originally Posted by robt57

Can't rule out anything until you rule out everything I always say.

Did you get to ride it at all yet I guess is a good question? In shipping a tight wire and a loose battery could certainly = the plug popping out of the battery.

yeah i rode it and it was fine. I thought the battery just went dead and began to charge it last night as well as my eps bike that had gone dead. EPS no prob, this one might just take more effort to sort out.

I HOPE it is just a loose wire somewhere or then I have a bike that is useless until I spend more money to just make it work. Oh goody.

[robt57]

Well, hope may not be a useful as help via this process.

Pull the seatpost and make sure the battery is in fact plugged in. While you have it in your hand take a pic and/or look ate the PN cast into it. Still betting BTR2. Could also be a DIY Battery solution too and not an actual Shimano battery.

I hate to suggest it, but the DIY charging solution may what be what bricked it. It sounds bricked certainly.

Have you eMailed who you got it form to be sure you implemented the charge as intended??

I am stuck on the red molex on your charger and what DIY shenanigans I have seen googling for Di2 hacks for my own shenanigans.....

[Dave B]

Originally Posted by robt57

Well, hope may not be a useful as help via this process.

Pull the seatpost and make sure the battery is in fact plugged in. While you have it in your hand take a pic and/or look ate the PN cast into it. Still betting BTR2. Could also be a DIY Battery solution too and not an actual Shimano battery.

I hate to suggest it, but the DIY charging solution may what be what bricked it. It sounds bricked certainly.

Have you eMailed who you got it form to be sure you implemented the charge as intended??

I am stuck on the red molex on your charger and what DIY shenanigans I have seen googling for Di2 hacks for my own shenanigans.....

yes and did exactly as he stated. He is a great forumite here and I have no doubt in him or his help. I did exactly what he told me to do, but honestly until I pull it, we are just guessing.

Oh goody nothing as exciting as this type of headache.

[loxx0050]

I too am curious on how this was modified to get this custom setup to work. If you can get the seller to provide more details I'd like to know what was put into it.

Other alternative is to find a EW90 junction (3 or 5 port) and you might need a couple of Di2 wires though to connect to your shifters and then bridge the connection to the battery/derailleurs. You would still need once of those BCR2 chargers too.

But if the system if bricked then you may need to take it in for a diagnostic (or find somebody locally to who has the connection/diagnostic tool). While the BCR2 can serve as a connection tool for basic diagnostics it doesn't have the full functionality as the actual diagnostic tool (the Shimano SM-PCE1 interface...which most people don't need).

[robt57]

Is it of the 10s or 11s cobbled variety. No negative connotation.

I started my Di2 life a few years back with a $99.00 pair of Jensen USA ST-6770 shipped. Once you learn it well, Shimano adds new things to learn too. Cumpuuters.. Zed.

[Dave B]

What is bricked? Does this mean the "system" needs a reboot or update?

[robt57]

Originally Posted by Dave B

What is bricked? Does this mean the "system" needs a reboot or update?

Yes, usually recoverable. But when DIY parts are in the equation, more is possible IMO. Your next quest is to get in there and lets see what battery is going on, is it actually still connected, and is it DIY.

Lord knows what the firmware versions are among the components.

Which is why I asked if 10 speed still.

I actually have a laptop off the net to keep the e-tube software from updates or me allowing a firmware update to a part to occur on a bike with 10 speed on it still.

I am about to do my first DIY battery actually, for an adventure bike that may get way out occasionally. 4xmah than orig batts.

yada.


Did yours start showing signs it needed recharge? And do you know what those indicators are? Both in system behavior and LED readout modes on your A junction and how to interpret?

[Look585]

That charger looks like one from a guy that assembled internal batteries years ago before the Shimano internal system was launched.

Called himself Di2DIY or DIYDi2 on eBay...

Looks like there was a facebook page but it is pretty dormant.

https://www.facebook.com/Di2SeatPostBatteryKits

Good luck!

[Dave B]

Originally Posted by robt57

Yes, usually recoverable. But when DIY parts are in the equation, more is possible IMO. Your next quest is to get in there and lets see what battery is going on, is it actually still connected, and is it DIY.

Lord knows what the firmware versions are among the components.

Which is why I asked if 10 speed still.

yeah it is still 10 speed.

[robt57]

Originally Posted by Dave B

yeah it is still 10 speed.

Nothing wrong with that, but it will present some possible unexpected challenges once plugged into a SM-PCE1 to do diagnostics.

Your system is pretty far away to being able to connect to e-tube/android.


I'd add sudden death without loosing first the systems ability to auto trim FD, then stop shifting RD after that... In my experience this happens from a poor battery, a RD jammed into recovery mode, or a failed connection point. Or a crashed/bent RD that is fighting the servo continually.

I am sure there are more/other reasons, just not in my experience, yet.

[Dave B]

ok, here is the cluster f$%^k that I was surprised with.

I was able to remove the battery and charge (I hope) it via the little red thing.

Exposed wire, poop storm of some sort in the ST.

Oh well, give it some time to charge and just deal with it I suppose.

https://photos.app.goo.gl/xpbCYZWM4KtSKYfP9

[glepore]

Photos aren't available, but there was an ebay seller selling conversion kits for first gen di2 stuff to mount internally. It was all fab'd, including the charger and battery.

In theory, you should be able to charge through a shifter port, assuming that's how the charger is set up and the connector is fully engaged. But the whole setup is bespoke and you'll have to troubleshoot it yourself, most likely.