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PostPosted: Wed Mar 06, 2013 8:04 pm 
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Joined: Thu Jun 28, 2012 5:08 am
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I am about to order the Shimano 9070 Di2 Group Set and install it on my current bike. The distributor has it in two forms, external and internal batteries. On my bike, the external would attach to a plate under the bottom bracket that puts the battery against the under side of the down tube. The internal fits into the seat post. From what I have read, the internal battery weighs less because it does not have to be weather sealed. Here are two questions I need answers to and have found nothing.

What process is required to charge the internal battery?

Assuming that charging means the additional inconvenience of pulling the seat post periodically, does having to do so outweigh the savings in weight and the visual disappearance of the battery?

Thank you in advance for your thoughts and they will influence my decision.


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Posted: Wed Mar 06, 2013 8:04 pm 
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 Post subject: Re: Shimano 9070 Di2
PostPosted: Wed Mar 06, 2013 8:07 pm 
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Joined: Wed Mar 06, 2013 4:23 pm
Posts: 290
Location: Austin, TX
It charges through a port on the front junction box under the stem. No need to remove the seat post.

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 Post subject: Re: Shimano 9070 Di2
PostPosted: Wed Mar 06, 2013 8:22 pm 
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Thank you, I hadn't thought about that as a charging method, but it makes sense that Shimano did it that way. So now the decision is down to weight savings and esthetics.


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 Post subject: Re: Shimano 9070 Di2
PostPosted: Wed Mar 06, 2013 9:59 pm 
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Joined: Mon Feb 19, 2007 7:26 am
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Location: Atlanta, GA, US
In which case the internal battery wins on both fronts :-)

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 Post subject: Re: Shimano 9070 Di2
PostPosted: Wed Mar 06, 2013 10:17 pm 
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Joined: Sun Mar 27, 2011 8:16 pm
Posts: 425
Image

Vs.

Image

The front junction box needed is annoyingly expensive though, plus you have to spend another £50 on cables for the shifters.


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 Post subject: Re: Shimano 9070 Di2
PostPosted: Wed Mar 06, 2013 10:26 pm 
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Joined: Thu Aug 09, 2012 12:32 am
Posts: 19
Location: Melbourne, AUS
I have the internal battery on my c'dale EVO and it is very neat and tidy, tucked into the seat post. I am looking at changing seat post from FSA to ENVE and when that happens the battery will be in the seat tube with foam around it to stop it rattling. Charge through port is simply plug in via USB cable. V happy

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 Post subject: Re: Shimano 9070 Di2
PostPosted: Wed Mar 06, 2013 11:05 pm 
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BCR2 plugged into the junction box?


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 Post subject: Re: Shimano 9070 Di2
PostPosted: Wed Mar 06, 2013 11:31 pm 
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Thank you all for your quick responses. Of course the idea that the battery might rattle in the seat tube is a little frightening. I just spoke with Gita Bike and Pinarello has an adaptor for use with the Shimano internal battery, so my guess is that rattling will not be a problem. The Pinarello external bracket that mounts under the bottom bracket and against the down tube is made of aluminum, so I doubt that the internal battery adaptor would weigh more. That brings it all back to the weight differential of the batteries. The distributor has (30) 9070s coming in on March 31st and half are already sold, so tomorrow is decision time. Thanks again for the help.


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PostPosted: Thu Mar 07, 2013 7:46 pm 
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Joined: Wed Jul 16, 2008 10:38 pm
Posts: 49
Location: North Wales
No rattling possible with the internal battery, it comes with a push fit sleeve for most / any seat post.

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PostPosted: Thu Mar 07, 2013 8:55 pm 
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Joined: Sun May 20, 2012 5:52 pm
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Location: Stockholm, Sweden
Mine didn't come with a sleeve.


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PostPosted: Thu Mar 07, 2013 9:19 pm 
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Joined: Wed Jul 16, 2008 10:38 pm
Posts: 49
Location: North Wales
n1klass wrote:
Mine didn't come with a sleeve.


Ooh dear... All I know is I've seen a photo with the internal battery surrounded by a bulgy sleeve:

Image

I've got a Di2 9070 group-set on order, so I hope mine comes with one!!

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PostPosted: Thu Mar 07, 2013 10:11 pm 
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Joined: Sat Jan 21, 2012 5:28 am
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I got a new batt in the box and it didn't come with that butt plug or O ring.


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PostPosted: Thu Mar 07, 2013 10:40 pm 
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Joined: Tue Oct 04, 2011 9:16 pm
Posts: 141
can i install the battery in a cervelo s5 with aero seatpost?


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PostPosted: Fri Mar 08, 2013 12:39 am 
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Joined: Sat Jan 21, 2012 5:28 am
Posts: 208
I did get the two "sleeves", various washers and "C" clip. It all seems quite useless. Suppied directions make no mention of the items.
Seems Shimano was sweeping the floors and just tossed the stuff in the box.


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PostPosted: Fri Mar 08, 2013 12:49 am 
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Joined: Sun Jan 09, 2005 5:14 pm
Posts: 367
Location: Sunny So Cal
I believe the bulgy sleeve in the pictures is from Trek and came with Madone 7k.


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Posted: Fri Mar 08, 2013 12:49 am 
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