Why my battery is not working

If your iPhone or iPod touch won't charge - Apple Support

Has the battery been replaced recently?

Did you make sure, that the charging port is free of lint and debris?

Are you using the original Apple USB Kabel and adapter?

Do you hear the "Connect" sound, if you connect to your adapter?

marienette ~ What model of iPhone is it?...

Settings > General > About > Model Name

And what's the Maximum Capacity % here?...

Settings > Battery > Battery Health

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