USB ports do not stay charging even if device isn’t full.

Using Charger port and authentic apple cord it oddly doesn’t stay charging my phone. It Shows lightening bolt when I connect , will check in a few minutes and it shows no connection, reconnect/reset the cord, phone not charged at all when I check in morning. Tried other cords and usb connectors. I haven’t figured out why... but when I need to start my day with a full charge and it’s done nothing it’s disappointing. There is the button on top for the half you use and I make sure that is on so double check and push on and off for red light to show me that side is on but it doesn’t continue to charge.

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