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PostPosted: Fri Sep 07, 2012 5:17 am 
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Joined: Fri Jun 19, 2009 12:03 pm
Posts: 130
Location: Denmark
Hi all,

I've been searching for a step-by-step instruction as to how you can strip the original Dura Ace Di2 battery from the casing and rewire (re-solder) it into the wire from the wiring harness. I seem to remember that Coloclimber did it on a Time a while ago but cant seem to find the post.

Anyone who can either 1)point me to a few posts that shows how to do this or 2)have instructions yourselves that you'd be willing to share?

Br Jonas

_________________
Colnago EPS Di2
Vortrieb CX bike on a budget


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PostPosted: Fri Sep 07, 2012 11:53 am 
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Joined: Wed Jun 09, 2010 10:44 am
Posts: 293
My advice, forget about hacking the actual battery, just buy some different 3.7v cells (14650's). Much easier. There is a mini circui board in the battery (load/charge protection I think it is) and gets messy trying to re-use.

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Posted: Fri Sep 07, 2012 11:53 am 


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PostPosted: Fri Sep 07, 2012 1:29 pm 
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Joined: Sat May 28, 2011 10:17 pm
Posts: 78
This old link may help you...
viewtopic.php?f=3&t=62064&hilit=scuro+di2&start=0


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PostPosted: Fri Sep 07, 2012 3:37 pm 
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Joined: Thu May 04, 2006 4:43 pm
Posts: 5362
Location: Wherever there's a mountain beckoning to be climbed
Don't just do it, find out how not to do it. Fried DA Di2


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PostPosted: Fri Sep 07, 2012 8:52 pm 
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Joined: Wed Jun 09, 2010 10:44 am
Posts: 293
Cococlimbers thread:-

viewtopic.php?f=10&t=67791

Also, had to charge mine today, so took some pics of my procedure along the way in case you're interested in this approach (using commonly available Lipo cells, chargers & holders)...

First, a very useful peice of coat hanger...

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So, bike needing charge...

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Seatpost off (spot the concealed pump in the seat post). Battery is down the tube...

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Doesnt look pretty at this stage, but its weather proof. (Water gets everywhere!)

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Removing the (disposable) layers, which are just plain old re-sealable baggies...

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Battery holder with connection plug (£0.99 from Ebay)...

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Cells removed (16340's, £4.99 from ebay)....

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Into the chargers(s) (£5.99 from ebay)....

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Wait... ( or swap in your 2 spares cells:) )

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Last edited by WeightySteve on Fri Sep 07, 2012 8:57 pm, edited 1 time in total.

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PostPosted: Fri Sep 07, 2012 8:55 pm 
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Joined: Wed Jun 09, 2010 10:44 am
Posts: 293
Now, start re-assembly...

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More weatherproofing...

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Pop it back in (with the coat-hanger/hook attachment)...

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Pump goes fully back into the post (easily removed with a quick tap)

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And done...

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PostPosted: Mon Sep 10, 2012 1:32 pm 
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Joined: Fri Jun 19, 2009 12:03 pm
Posts: 130
Location: Denmark
Thanks for all the excellent answers guys. I'll give it a go based on the advice here - thanks!

Br Jonas

_________________
Colnago EPS Di2
Vortrieb CX bike on a budget


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Posted: Mon Sep 10, 2012 1:32 pm 


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