Why should I activate my Hp Battery before first time usage?

New HP batteries come in a slightly discharged condition and must be fully charged before use. It is recommended that you fully charge and discharge your new battery two to four times to allow it to reach its maximum rated capacity. An overnight charge (approximately twelve hours) is recommended. Note: It is normal for a battery to become warm to the touch during charging and discharging. When charging the battery for the first time, the device may indicate that charging is complete after just 10 or 15 minutes. This is normal with rechargeable batteries. New batteries are hard for the device to charge; they have never been fully charged and not “broken in.” Sometimes the device's charger will stop charging a new battery before it is fully charged. If this happens, remove the battery from the device and then reinsert it. The charge cycle should begin again. This may happen several times during the first battery charge.

hp 800049-001 battery 14.6V or 14.8V or 15V 2670mAh laptop batteries
Voltage: 14.6V or 14.8V or 15V
Capacity: 2670mAh (41Wh)
Battery cells: 4-cell
Chemical: Li-ion
Battery Color: black
Condition: new original battery
Warranty: 9 months