MX4 Pro slow charging

I have a MX4 Pro 32Gb, chinese edition. My problem is that, if i use the official charger, it charge about 7-8 hours, and if a i use other charger, it charge about 6 hours.
Is that normal? what is the problem? thank you!


not normal for sure… 1.5-2h from 10 % to 100 % tops

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