The steps are the following:
First of all you have to close the App: INTERCOM DIGITAL . When this application is activated, the phone charge is very limited. By doing this step, your cell phone should load much faster. I went from getting a 10% charge in 2.5 hours to 10% charge in just 30 minutes.
If the problem persists, it will be necessary to change the Cable USB and do not forget to close the application INTERCOM DIGITAL.
greetings from Chile... UPMOVILCHILE