Due to regulatory requirements for certain regions, your battery may ship with less than 100% charge on it.
Sometimes the batteries may arrive after being in transit for days/ weeks in less than ideal conditions. Although the batteries are designed to handle these situations the end-user would need to ensure that the battery is properly charged the first time after delivery.
Once you receive a new battery:
Keep your battery (off the bike) in a safe place at room temperature for 1-2 hours.
Plug the charger to the wall first and then connect the charger plug to the charging port of the battery.
Let the battery sit undisturbed (at room temperature) till fully charged.
Once fully charged, connect it to the bike and test the bike operations.
For more details on Battery Care & Maintenance please refer to the link below.