1 Copper

battery wear vostro 3490

Hello, sorry for my English. 

First, I bought a Vostro  3590 with I5 10th generation. From the beginning I had wear 5% at the battery. I charged the battery up to 100% and then I had discharged the battery but nothing changed so I returned the computer. Now, I bought a vostro 3490 and I have the same problem . All Vostro have this problem? I have to return this one too?  

And, one more think. from 99% to 100% it takes about 15 minutes

          Thank you