Shimano Ultegra R8050 Series Dealer's Manual page 154

CHARGING THE BATTERY
When charging is not possible
Built-in type (SM-BCR2/SM-BTR2, BT-DN110)
1
Make sure that only one unit of SM-BCR2 is connected to a PC.
If the ERROR indicator blinks
If the CHARGE indicator blinks
2
If none of the above (1 to 2) is the case, the battery or junction may be faulty.
3
If the ERROR indicator blinks, the
ambient temperature during charging
may fall outside the operating
temperature limits.
Check that the temperature is
appropriate.
(A)
If the CHARGE indicator blinks, refer to
the following.
• The current capacity of your AC
(A)
• Connection is using a USB hub.
adapter with a USB port is lower than
1.0Adc.
 Use an AC adapter with a USB port
with a current capacity equal to or
higher than 1.0Adc.
 Remove the USB hub.
154
(A)
ERROR indicator
(A)
CHARGE indicator
NOTE
If the CHARGE indicator does not light up or
goes out soon, the battery may be fully
charged. Check the remaining charge in the
battery via junction A or the system
information display.
If the battery is low or dead, contact the place
of purchase or a bicycle dealer.
If it becomes impossible to charge, the
CHARGE indicator (orange) or ERROR
indicator of the battery charger will blink.