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If the headset is not used for a long time, the rechargeable battery usage hours may be reduced. However, the battery life will improve after a few recharges. You can use the headset by connecting the supplied headphone cable, even while charging the headset.
Sony WH-1000XM4 Wireless Noise Cancelling Headphones Sony WH-1000XM4 Wireless Noise Cancelling Headphones
Time required for charging the empty battery to its full capacity. The time may be different depending on the conditions of use. Distortions appear when your Headphone has accumulated a significant extent of debris, dust, and dirt. As such, if you find such instances with your Sony Headphone, you need to clean it immediately.When using earbud tips other than the ones supplied, the headphones may not fully seat into the charging case and, therefore, may not correctly charge. The headset cannot be charged when the computer goes into standby (sleep) or hibernation mode. In this case, change the computer settings, and start charging once again. If the headset detects a problem while charging due to following causes, the indicator (red) may turn off, although charging is not complete. In this case, charge again within the charging temperature range. If the problem persists, consult your nearest Sony dealer.
Charging the headset - Sony WH-CH710N | Help Guide | Charging the headset - Sony
If the headset is not used for a long time, the indicator (red) may not light up when you connect the micro-USB cable to charge the headset. In this case, do not disconnect the micro-USB cable from the headset: wait a few minutes until the indicator (red) lights up. It is recommended to use a USB AC adaptor compatible with 5 V/2 A or 9 V/3 A output. Personal computer
Use the supplied micro-USB cable only, and connect directly to a computer. Charging will not be completed properly by an indirect connection, such as via a USB hub. Charging may not be successful or require more charging time depending on the type of USB AC adapter.
Headphones Short Charger Cable, Compatible with GEEKRIA USB Headphones Short Charger Cable, Compatible with
HD Noise Cancelling Processor QN1, Bluetooth Audio SoC and a dual noise sensor let you listen without distractions The headset cannot be turned on, nor can the BLUETOOTH and noise canceling functions be used, during charging. If the charging case becomes misaligned with the wireless charging pad, charging may slow down or stop, or the charging case may become hot. For details on how to properly set the charging case on the charging pad, refer to the charging pad manual. Lights up in green for about 6 seconds when the lid of the charging case is opened or closed with the headphones are stored
If the headset is not used for a long time, the charging indicator (red) may not immediately light up when charging. Please wait a moment until the indicator lights up.
WH-1000XM4 | Help Guide | Charging the headset - Sony
If the usage hours of the built-in rechargeable battery decreases significantly, the battery should be replaced. Consult with your nearest Sony dealer to replace the rechargeable battery. By default, music resumes playing 30 seconds after your conversation ends in Speak-to-Chat mode. This timeframe can be customized using the Sony | Headphones Connect app. A commercially available USB AC adaptor capable of supplying an output current of 0.5 A (500 mA) or more Personal computerIf the headset detects a problem while charging due to the following causes, the charging indicator (orange) flashes. In this case, charge once again within the charging temperature range. If the problem persists, consult your nearest Sony dealer.