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Warp Charge animation shows but getting slow charging speed Apr 10, 2020 via OnePlus 7 Pro Mirror Gray

Aimanulll , via OnePlus 7 Pro Mirror Gray , Apr 10, 2020 :

Hi guys.

Recently I bought a cable from an online shop since my old cable stopped working recently. When I plugged the new cable to my phone, the warp charge animation still shows but I felt like the charging time is a bit slower.

I measured the current going into phone using the Ampere app and it measured the current going into my phone is only about 1500 ~ 2000 mA as shown in the screenshot below. I also noticed when I plugged my phone, there was a spike in the current going in to about 3000mA but later it drops down to 1500~2000mA.

Could it be the cable that I received was fake or there is some kind of problem with my phone or the charging brick?