My air which is 4 years old now keeps shutting off immediately if it gets disconnected from the charger. It won't even turn on if it's not plugged in. It started happening about a month ago randomly, but not consistently. At the beginning sometimes it would shut down when the battery was only at 80%. Now even though it says 100% if the charger accidentally gets pulled out it'll just turn off.
I've tried resetting the SMC a few times but it didn't seem to do anything. I don't think I have the right screwdrivers to try to actually take the battery out myself.
I copied the battery info below and attached a screenshot of the coconut battery.
Does this mean I need to replace it? It's about $130 on Apple's website to get a new one. If I do need to, how can I avoid this for the future?
Battery Information: Model Information: Serial Number: C0153670BW1F90MA9 Manufacturer: DP Device Name: bq20z451 Pack Lot Code: 0 PCB Lot Code: 0 Firmware Version: 511 Hardware Revision: 000a Cell Revision: 1200 Charge Information: Charge Remaining (mAh): 6103 Fully Charged: Yes Charging: No Full Charge Capacity (mAh): 6280 Health Information: Cycle Count: 401 Condition: Replace Now Battery Installed: Yes Amperage (mA): 0 Voltage (mV): 8460 System Power Settings: AC Power: System Sleep Timer (Minutes): 60 Disk Sleep Timer (Minutes): 10 Display Sleep Timer (Minutes): 60 Wake on AC Change: No Wake on Clamshell Open: Yes Wake on LAN: Yes AutoPowerOff Delay: 14400 AutoPowerOff Enabled: 1 Current Power Source: Yes DarkWakeBackgroundTasks: 1 Display Sleep Uses Dim: Yes GPUSwitch: 2 Hibernate Mode: 3 PrioritizeNetworkReachabilityOverSleep: 0 Standby Delay: 10800 Standby Enabled: 1 Battery Power: System Sleep Timer (Minutes): 15 Disk Sleep Timer (Minutes): 10 Display Sleep Timer (Minutes): 15 Wake on AC Change: No Wake on Clamshell Open: Yes AutoPowerOff Delay: 14400 AutoPowerOff Enabled: 1 DarkWakeBackgroundTasks: 0 Display Sleep Uses Dim: Yes GPUSwitch: 2 Hibernate Mode: 3 Reduce Brightness: Yes Standby Delay: 10800 Standby Enabled: 1 Hardware Configuration: UPS Installed: No AC Charger Information: Connected: Yes ID: 0x07a1 Wattage (W): 45 Family: 0x00ba Serial Number: 0x008475d0 Charging: No