How long does the battery take to charge and what is the battery warranty?

The battery charges up to 90% within 90 minutes when the system is off or in standby mode, using the provided power adapter with no external devices connected. After reaching 90% capacity, charging speed returns to normal, and charging time may vary +/-10% due to system tolerance. The battery comes with a 1-year warranty, and it is internal and not replaceable by the customer — it is serviceable by warranty. (Pages 2, 4)