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Di2 Battery ??s

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Old 10-25-18 | 03:47 PM
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Di2 Battery ??s

About a year ago, bought a complete Ultegra 6800 Di2 groupset for a build that has not happened yet. Do I need to do anything to maintain battery or is it fine in the box and on the shelf?
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Old 10-25-18 | 05:49 PM
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The first place to look for anything related to Shimano is the Shimano Technical Documents website.

Manuals & Technical Documents

Your best bet is to find the dealer manual for your system and see if it contains anything about long term storage of the battery. It might not, but it might.


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Old 10-25-18 | 06:58 PM
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Well, I'd make certain that nothing was plugged into the battery while in storage. Most rechargeable batteries appreciate an occasional maintenance charge, as they do self-discharge over time.
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Old 10-25-18 | 07:07 PM
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Charge it to about 50%
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Old 10-25-18 | 07:22 PM
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don't try this at home.
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It's best not to keep it discharged or fully charged.

Dinotte lights told me to long term store their headlight battery packs at about 7.8v. Fully charged, they are 8.4v.

I'm not sure if you can just plug in the junction box with the usb connector to the battery and charge it. It's possible it needs the shifters and derailleurs configured too. And the battery level lights work from a long press of one of the shifter buttons, anyway.

Try the battery, a connector cable, and the junction box. See if the free E-tube Project software shows a charge level when the charger is plugged into the PC's USB.
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Old 10-25-18 | 08:17 PM
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Originally Posted by rm -rf
It's best not to keep it discharged or fully charged.

Dinotte lights told me to long term store their headlight battery packs at about 7.8v. Fully charged, they are 8.4v.

I'm not sure if you can just plug in the junction box with the usb connector to the battery and charge it. It's possible it needs the shifters and derailleurs configured too. And the battery level lights work from a long press of one of the shifter buttons, anyway.

Try the battery, a connector cable, and the junction box. See if the free E-tube Project software shows a charge level when the charger is plugged into the PC's USB.
If you follow RM’s good advice and use a laptop, make sure the PC is on shore power. Some laptops don’t provide enough charging capability out of the USB ports when on local battery.
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Old 10-25-18 | 08:44 PM
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The D12 dealer manuals at the Shimano Technical Documents web page all say the following:



Manuals & Technical Documents


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