Qi charger can discharge iPhone

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Level 10

91,051 points

Qi charger can discharge iPhone

I have seen only one or two mentions of this and I don’t understand the mechanism. As far as I know charging is a one-way process so I was surprised to see this battery graph which is repeatable.

This particular third party charger will charge to 100% then shut off.

If I remove the phone from the charger it will retain its charge, but if I leave it on there it will discharge at an alarming rate.

Removing after charge

Leaving on the charger

I’m happy to ditch the charger but I don’t understand how this can happen.

iPhone 12, iOS 17

Posted on Jan 14, 2024 3:00 AM

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Answer 1

Top-ranking reply

Katana-San

Level 9

68,773 points

Jan 14, 2024 5:39 AM in response to LD150

That’s pretty interesting to see. If you don’t know …I haven’t a clue.

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Answer 2

WheelieNick

Level 8

39,795 points

Jan 14, 2024 3:28 AM in response to LD150

Is this charger certified by Apple? If no, you're don't want to use it with your iPhone

The discharge can come due to optimized charging, but then you expect a discharge of a pew percent. Not discharging at an alarming rate as you call it

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Answer 3

Katana-San

Level 9

68,773 points

Jan 14, 2024 6:33 AM in response to LD150

I have always had great support through eBay here if I report the item as “not as described” This with the supporting information you have should be more than enough. Attach those screenshots to your return. Obviously something is off for it to be discharging like that. 🙃🙃

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Answer 4

LD150 Author

Level 10

91,051 points

Jan 14, 2024 3:37 AM in response to WheelieNick

Thanks, the charger claims to be Qi certified and AFAIK that is all that is required. I’m quite prepared for the Qi certification to be a lie on an eBay €8 device, but surely the wireless phone circuit is diode protected against discharge?

Other ASC responses in previous years blame software as the charge is one-way, however none of the OPs gave evidence if what happens off the charger. I wonder what other software could be persuaded to discharge without leaving a trace in the battery graph.

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