Yamaha YBR250 2007 Service Manual page 101

CHECKING AND CHARGING THE BATTERY
Charging
Ambient temperature 20 °C (68 °F)
18
17
16
15
14
13
12
11
10
0 10 20 30
14
13
12
11
10
75 50 30 2520
100
Charging condition of the battery (%)
40 50 60
Time (minutes)
Check the open-circuit
voltage
Ambient
temperature
20 °C (68 °F)
0
3-45
5. Charge:
• battery
(refer to the appropriate charging method
illustration)
V V V V V
WARNING
Do not quick charge a battery.
CAUTION:
• Never remove the MF 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 battery
overheating and battery plate damage.
• 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 remove
it from the vehicle. (If charging has to be done
with the battery mounted on the vehicle,
disconnect the negative battery 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 battery.
• 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,
disconnect 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 MF battery
stabilizes about 30 minutes after charging
has been completed. Therefore, wait 30
minutes after charging is completed before
measuring the open-circuit voltage.
CHK
ADJ