USB charger plugs into an SM-EW90 junction allowing batteries to be charged while still attached
. Di2 uses a powerful long-life 7.4V Li-Ion battery: keep it in top condition and ready for shifting with this specific Shimano Di2 charger
. 1.5 hour charge time
. Plugs in directly to the SM-EW90 handlebar junction A
. Can also be used for completing firmware updates when linked to E-tube software on your
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