Battery suddenly falls about 20%

Hello

3 months ago I bought a Z500, but after a few days, the battery started down whenever he reaches around 20%.sometimes that he climbed 6 percent and critical battery alarm, other times it right hybernated away.but full load to 20% battery life was normal.

I went to the support and they changed the battery two times and also updated my bios but that does not solve the problem so I called for a new laptop, I paid for the difference in price and bought a Y510p, but now, after 20 days, I have exactly the same problem with this new laptop. I'm confused and angry right now.what is bad?

I got a picture of when the problem occurred and the laptop BatteryMon is off.the all the time I've been watching movies or surfing the internet.

http://S23.postimg.org/4patwt3pn/122115151.jpg

can anyone help please?

In fact, it happens when I don't use the laptop on battery when it is plugged.

I ' v been load from another outlet for a while now and for the last two days, the problem does not appear. I don't know what the relationship is, but I geuss something wrong with the power outlet in my room.

I'll post again if it is.

Thank you guys

Tags: Lenovo Notebooks

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