The battery can be charged in the bike or after removal from the bike.
This page shows how to charge the battery in the bike. The procedure
for charging the battery off the bike is the same, once battery is
removed.
How to Charge Battery
Place the bike in a dry area
The temperature of room and battery must be above 35F.
If the battery has been stored in a room that is below 35F, then it
should be put in a room above 50F for several hours prior to
charging.
If the battery is hot, the charger may not come on right away. Leave
the charger plugged in and the charging will begin automatically
when the battery cools.
Charging the battery when it is under 35F will damage the battery and void
the warranty.
Only use the Optibike supplied charger.
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It is OK to leave the bike on the charger overnight. The charger
will turn off automatically when the bike is charged.
It is OK to remove the bike from the charger at anytime during
the charge cycle.
The fan in the charger is temperature controlled, so it may not
come on right away. It will come on as the charger gets hot during
the charge cycle.
Optibike R8C and R15C Manual
