How to stop android from charging PS4 controller?

Gavin Crane PC

Reputable
Mar 11, 2015
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I recently bought an OTG cable to play emulators on my phone using a PS4 controller. However, my phone charges the controller which drains my battery very fast. I have tried changing the USB configuration to PTP (Picture Transfer Protocol, MTP and other settings but it still charges the controller. I am not willing to go wireless. Any suggestions?

Thanks for your help in advance