Retrospec KOA REV+ Assembly Instructions Manual page 35

After plugging the power
outlet, no charger indicator
LED is lit.
After charging over 4-5
hours, the charger indicator
LED is still red, while the
battery is still above not full
(NOTE: it is very important
to charge your bike strictly
according to this instruction
stated in Chapter 7, to avoid
any trouble and damage
occurred to your bike.
1) trouble from the power
outlet; 2) poor contact
between charger input plug
and power outlet; 3) the
temperature is too low.
1) environment temperature
is 40°C and above.
2) environment temperature
is under 0°C. 3) failed to
charge bike after riding,
resulting in over discharge.
4) the output voltage is too
low to charge the battery.
1) check and repair the
power outlet. 2) check and
insert the power outlet
tightly. 3) charge it in house.
1) charge the battery in
an area under 40°C, or
according to this instruction
chapter 7; 2). charge the
battery inside the house, or
according to this instruction
chapter 7; 3) please well
maintain the battery
according to the Chapter
6.3 to avoid natural over-
discharge; 4) no charging
when the power supply is
lower than 100V.
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