User profile for user: about78
about78 Author
User level: Level 1
12 points

Magic Keyboard A3118 not holding charge.

I'm using a 2024 iMac purchased new Dec 2025. The Magic Keyboard is A3118 with a C charging port. After latest IOS update to Tahoe 26.5.2 the keyboard battery has not held a charge longer than 2 weeks. My 21.5 in iMac magic keyboard would hold charge for 3-4 months. I do not turn my computer off. It runs in sleep mode 75 % of the time.


In addition, my computer takes 30 + seconds to come out of sleep mode since last IOS update. Usually all I did was press the space bar and it would awake. Not sure if there is correlation here. Keyboard definitely not holding a charge like previously. Ideas or need battery replaced?


iMac 24″, macOS 26.5

Posted on Aug 12, 2026 11:13 AM

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User profile for user: WheelieNick
WheelieNick
User level: Level 9
54,731 points

Posted on Aug 12, 2026 11:23 AM

Yes, the slow 30-second wake issue and the rapid keyboard battery drain are almost certainly correlated. A corrupted Bluetooth daemon or power management state in macOS Tahoe 26.5.2 can cause your iMac to struggle to re-establish a secure connection upon wake. This forces the Magic Keyboard (A3118) to repeatedly broadcast and poll for the sleeping Mac, draining the battery in weeks instead of months. Your hardware is likely fine; it is a software/handshake bug. 

Software and Connection Fixes

  • Reset Bluetooth Pairing: Go to System Settings > Bluetooth, hover over your Magic Keyboard, click Disconnect or Forget This Device, turn the physical switch on the keyboard off and on, and re-pair it.
  • Power Cycle the iMac: Shut down your iMac completely, unplug the power cord for 30 seconds, plug it back in, and turn it on. This flushes the low-level hardware power and connection states. 


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User profile for user: WheelieNick
WheelieNick
User level: Level 9
54,731 points

Aug 12, 2026 11:23 AM in response to about78

Yes, the slow 30-second wake issue and the rapid keyboard battery drain are almost certainly correlated. A corrupted Bluetooth daemon or power management state in macOS Tahoe 26.5.2 can cause your iMac to struggle to re-establish a secure connection upon wake. This forces the Magic Keyboard (A3118) to repeatedly broadcast and poll for the sleeping Mac, draining the battery in weeks instead of months. Your hardware is likely fine; it is a software/handshake bug. 

Software and Connection Fixes

  • Reset Bluetooth Pairing: Go to System Settings > Bluetooth, hover over your Magic Keyboard, click Disconnect or Forget This Device, turn the physical switch on the keyboard off and on, and re-pair it.
  • Power Cycle the iMac: Shut down your iMac completely, unplug the power cord for 30 seconds, plug it back in, and turn it on. This flushes the low-level hardware power and connection states. 


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Magic Keyboard A3118 not holding charge.

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