What should you do when get Acer swift 3 sf314-42-r8z7 battery for the first time?

Use  this  conditioning  process  for  all  new  batteries,  or  if  a  battery hasn't been used for a long time.

The battery conditioning  process ensures your battery accepts the
maximum possible charge. Failure to follow this procedure will prevent you from obtaining the maximum battery charge, and will also shorten the effective lifespan of the battery.
In addition, the useful lifespan of the battery is adversely affected by
the following usage patterns:
• Using the computer on constant AC power.
• Not  discharging  and  recharging  the  battery  to  its  extremes,  as
described above.
• Frequent use; the more you use the battery, the faster it will reach
the end of its effective life. An embedded battery has a life span of
more than 1,000 charge/discharge cycles.

The above sources from manual 

Acer swift 3 sf314-42-r8z7 battery

Brand new acer swift 3 sf314-42-r8z7 11.25V 4471mAh laptop batteries
    

    Price: 100 NZD
    Voltage: 11.25V
    Capacity: 4471mAh (50.29Wh)
    Battery cells: 3-cell
    Chemical: Li-ion
    Battery Color: black
    Condition: new original battery
    Warranty: 9 months
    Free shipping: Yes
    Worldwide shipping: Yes

The battery is available here: https://www.storebattery.co.nz/acer-swift-sf314-42-r8z7-11.25v-4471mah-laptop-battery-store-for-new-zealand-p-467512.html

 

Medion akoya e6245 general handling of rechargeable batteries notice

When handling rechargeable batteries, it is important to ensure that they are
correctly used and charged so that the capacity of the battery is fully utilised and its
service life is maintained for as long as possible. The optimal charging temperature
is approx. 20 °C.. Please also take note of the safety instructions on “Safety
Instructions“.
 ` Carry out a complete discharging and charging cycle once a month, then store
the device with approx. 50% of the battery capacity. This will prevent the battery
becoming full discharged and permanently damaged or no longer capable of
being charged.
 ` The device should not be charged unattended.
 ` Do not position the device on sensitive or highly flammable materials during the
charging process.
 ` Do not cover the notebook while charging the battery.

 The above sources from official manual.

Brand new medion akoya e6245 11.4V 3740mAh laptop batteries

• Voltage: 11.4V
• Capacity: 3740mAh (42Wh)
• Battery cells: 3-cell
• Chemical: Li-Polymer
• Battery Color: black
• Condition: new original battery
• Warranty: 9 months

You can always get it with free shipping here: https://www.storebattery.co.nz/medion-akoya-e6245-11.4v-3740mah-laptop-battery-store-for-new-zealand-p-408948.html