
When your laptop is plugged into the power adapter the battery goes to 'standby mode' while your laptop runs directly on electricity from the wall outlet.

Run on battery power without the AC adapter cord at least once a week to keep the A1321 battery cells active and at their peak potential.Condition and break in your new battery by performing 5 partial discharge and recharge cycles the first week you receive your new battery. A brand new A1321 notebook battery is in a weakened condition since it has not been conditioned yet.It is probably fully charged within 5 hours. It is a common practice to leave laptops plugged in after they have been turned off so that the battery has a full charge the next time you use your laptop. Once a computer battery is fully charged it will no longer accept any more power. Any new A1321 battery should first be fully charged by leaving it plugged in overnight.This is the Replacement Apple A1321 Li-Polymer Battery, You can extend the life of your laptop battery significantly through the proper care and handling of your battery. View MacBook Pro 15 Inch A1321 All Details.
