How long does it take to charge Canon ixus 1 10 battery for the first time?

The first three charges 12 and 3 hours are the old calendars for charging nickel-cadmium batteries. Cadmium-nickel battery has a strong memory effect, so I plan to charge it several times before, so that it can give full play to the efficiency of the battery after it is "recorded". The current lithium battery basically has no memory effect, so there is no need to do this again. For a lithium battery, whether it is charged for the first time or every time after, as long as the green indicator light of the charger is on, it means it is full. According to the instructions, this time is about 2 hours. (You should stop charging. In fact, Canon's charger has the function of "overcharge" protection. Once the battery is fully charged, it cannot be charged even if it continues to be charged.