Yamaha FJR1300AP 2010 Mode D'emploi page 29

Example
Open-circuit voltage = 12.0 V
Charging time = 6.5 hours
Charge of the battery = 20–30%
A. Relationship between the open-circuit
voltage and the charging time at 20 °C
(These values vary with the temperature,
the condition of the battery plates, and
the electrolyte level.)
B. Open-circuit voltage (V)
C. Charging time (hours)
D. Time (minutes)
E. Charging condition of the battery (%)
F. Ambient temperature 20 °C
a. Charging
b. Check the open-circuit voltage
5. Charge:
Sub-battery
(refer to the appropriate charging method il-
lustration)
Do not quick charge a battery.
Never remove the VRLA (Valve Regulated
Lead Acid) battery sealing caps.
Do not use a high-rate battery charger
since it forces a high-amperage current
into the battery quickly and can cause bat-
tery overheating and battery plate dam-
age.
If it is impossible to regulate the charging
current on the battery charger, be careful
not to overcharge the battery.
When charging a battery, be sure to re-
move it from the vehicle. (If charging has
to be done with the battery mounted on the
vehicle, disconnect the battery negative
lead from the battery terminal.)
To reduce the chance of sparks, do not
plug in the battery charger until the battery
charger leads are connected to the bat-
tery.
Before removing the battery charger lead
clips from the battery terminals, be sure to
turn off the battery charger.
Make sure the battery charger lead clips
are in full contact with the battery terminal
and that they are not shorted. A corroded
battery charger lead clip may generate
heat in the contact area and a weak clip
spring may cause sparks.
If the battery becomes hot to the touch at
any time during the charging process, dis-
connect the battery charger and let the
battery cool before reconnecting it. Hot
batteries can explode!
As shown in the following illustration, the
open-circuit voltage of an VRLA (Valve
Regulated Lead Acid) battery stabilizes
about 30 minutes after charging has been
completed. Therefore, wait 30 minutes af-
ter charging is completed before measur-
ing the open-circuit voltage.
Charging method using a variable-current
(voltage) charger
a. Measure the open-circuit voltage prior to
charging.
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MAINTENANCE