Sony WH-CH700N Help Manual page 17

D: 50% to 20%
E: 20% or lower (needs to charge)
Hint
You can also check the remaining battery charge with the "Sony | Headphones Connect" app. Android smartphones and iPhone
/iPod touch support this app.
Note
If you connect the headset to an iPhone or iPod touch with "Media audio" (A2DP) only in a multi point connection, the remaining
battery charge will not be displayed correctly.
Related Topic
What you can do with "Sony | Headphones Connect" app
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