Acer aspire battery not working after drain it

  Nicolás Noreña Toro 03:42 16 Sep 2018
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So I contacted acer tech support for a problem with the hdmi port not working, and one of the posible solution the guy told me was to drain the battery by pushing a button that is under the acer laptop aspire F 15, and after doing that i'm only able to use the lapton while it is plug in, it shows the battery charging at 47% but it doesn't really charge,and when I plug out the cord, it immediately shut off. Now i'm thinking the battery is dead, Do you guys know a solution for this?

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