The phone would run out of battery in just a couple of hours, and it was incredibly annoying. The workshop found out that the problem was the battery, which had been worn out for a long time. I agreed to a replacement, plus the master offered a little cleaning to improve the contacts. The money was affordable, but we did everything during the day. Now the phone easily holds a charge all day and even more. Separately, I would like to note that they did not charge money for the diagnosis. There is also a warranty for the replaced battery, so I'm not worried.