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PostPosted: Wed May 24, 2017 9:38 am 
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Joined: Wed Feb 22, 2006 7:57 am
Posts: 1072
Location: New Zealand
Try unplugging and then re-plugging each of the Di2 wires. I had a similar battery drain and it was a cable which wasn't seating correctly into the Junction A.

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PostPosted: Wed May 24, 2017 9:53 am 
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On my 9070 rear mech I never even set the limit screws at all - they were fully wound out. It worked fine.

And yes, DO NOT use any old USB wall socket charger.

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Posted: Wed May 24, 2017 9:53 am 


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PostPosted: Wed May 24, 2017 10:40 am 
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Posts: 337
Is the Apple USB charger ok?

I don't intend to take my laptop with me on vacation!

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PostPosted: Wed May 24, 2017 11:04 am 
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Joined: Wed Apr 25, 2007 10:23 am
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Location: Pack filler
havana wrote:
Is the Apple USB charger ok?

I don't intend to take my laptop with me on vacation!


I've read somewhere that shimano have changed the required rating for charging, so might be worth checking what your phone charger is rated at first.

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PostPosted: Wed May 24, 2017 12:02 pm 
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Joined: Wed Jan 10, 2007 10:56 pm
Posts: 1386
Location: Canada
Needs to be greater than 1 amp output.

Sent from my SM-G900W8 using Tapatalk

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PostPosted: Wed May 24, 2017 2:36 pm 
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The Apple iPad charger is 2.1A.

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Most "innovations" in cycling are solutions for non-existing problems.


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PostPosted: Wed May 24, 2017 2:49 pm 
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Posts: 1386
Location: Canada
Yup. That's not the problem then.

Sent from my SM-G900W8 using Tapatalk

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PostPosted: Wed May 24, 2017 6:23 pm 
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Joined: Sun May 16, 2010 7:28 pm
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Take the wheel out of the bike and see if the battery still drains. That'll tell you if it's an adjustment problem


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PostPosted: Thu May 25, 2017 5:02 am 
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Joined: Wed Aug 27, 2014 5:26 am
Posts: 239
Location: PNW
I had a similar problem this week. I was traveling with my bike. Before I packed it up for the flight home, the Di2 battery level was at 90%. As part of the packing process, I unplugged the 3 Di2 wires that go into the junction box and the 1 that goes to the rear derailleur. I flew home the next morning, a 2 hour flight, and rebuilt the bike that evening. The battery after rebuilding was 5%. What could have caused the battery drain?


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PostPosted: Thu May 25, 2017 6:18 am 
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Joined: Tue Mar 18, 2014 10:13 pm
Posts: 457
Location: Great Southern Land
eaglejackson wrote:
I had a similar problem this week. I was traveling with my bike. Before I packed it up for the flight home, the Di2 battery level was at 90%. As part of the packing process, I unplugged the 3 Di2 wires that go into the junction box and the 1 that goes to the rear derailleur. I flew home the next morning, a 2 hour flight, and rebuilt the bike that evening. The battery after rebuilding was 5%. What could have caused the battery drain?


Hmmm, sounds like a case of jet lag............... sorry couldn't help myself :oops:

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PostPosted: Thu May 25, 2017 10:02 am 
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was the flight particularly draining?


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PostPosted: Fri May 26, 2017 6:45 am 
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Joined: Wed Aug 27, 2014 5:26 am
Posts: 239
Location: PNW
beanbiken wrote:
eaglejackson wrote:
I had a similar problem this week. I was traveling with my bike. Before I packed it up for the flight home, the Di2 battery level was at 90%. As part of the packing process, I unplugged the 3 Di2 wires that go into the junction box and the 1 that goes to the rear derailleur. I flew home the next morning, a 2 hour flight, and rebuilt the bike that evening. The battery after rebuilding was 5%. What could have caused the battery drain?


Hmmm, sounds like a case of jet lag............... sorry couldn't help myself :oops:

Good one. All the same time zone, though. Perhaps the cargo compartment was very cold and the cold drained the battery?

What was funny is that I put a luggage tracking device called a LugLoc in the bike bag. The iPhone app looks for the device, first trying Bluetooth, and if that fails, sees if it can get a GPS location from the device, transmitted over the cell network. After we landed in Seattle but before we got to the gate, while sitting in my seat, I opened the LugLoc app to locate the bag to see if made the flight. It found the device "within 3 feet". The bag must have been directly below me in cargo.


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