Thread: Di2 Battery Voltages
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Old 08-23-23 | 11:30 AM
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Barry2
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Joined: Sep 2019
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From: SF Bay Area

Bikes: 1981 Holdsworth Special, 1993 C-dale MT3000 & 1996 F700CAD3, 2018 & 2019 Cervelo R3’s & 2022 R5, JustGo Runt, Ridley Oval, Kickr Bike 8-)

Di2 charging
Often the cause of a Di2 battery that won't charge is the USB power supply.
Shimano spec is for input 5V 1A, but a lot of the 1A adaptors that come with phones can't actually manage 1A.

I'd suggest finding a 5V 2A adaptor and charging them again.

Barry

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