Sony WH-1000XM4 Headphones Battery Low, Please Recharge Headset Repair

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Sony WH-1000XM4 Headphones Battery Low, Please Recharge Headset Repair
Device WH-1000XM4, WH-1000XM3
Affects part(s) Battery
Needs equipment Screwdriver, pry tool
Difficulty ◉◌◌◌ Easy
Type Part replacement


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Problem description

How to fix Sony WH-1000XM4 / WH-1000XM3 headphones that say "battery low, please recharge headset" and will not charge

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Symptoms

  • Headphones are not charging.
  • You hear a low battery message from the headphones.

Solution

  • If you did not just disconnect/connect the battery, put the headphones on a known good charger for about an hour.
  • If you did just disconnect and re-connect the battery, power off the headphones normally then power them back on. The headphones will say this anytime the battery has been disconnected and reconnected or replaced but a reboot always fixes it.
  • Use a multimeter to check the battery. Battery should read between 3.7v and 4.2v. If it's outside of this range, replace the battery with another one.
  • If the above does not fix the issue and the battery voltage is good, replace the SUB_R board.