I bought a new laptop with long battery life span (12 hours) (it arrived on --04-21 in the evening) and calibrated the battery as described in this question on --04-23 to get an accurate reading on the remaining time. Regarding the unclear point (the question) there: I had the laptop turned off when charging at first but then turned it on after some time.

Then I used the laptop until --04-27 which is when it was turned on the last time until today (--05-01). I didn't discharge it anywhere as low as for the calibration. In fact, I looked for a laptop with a very long battery life time so I could avoid discharging it below 20% so it will work for a long time.

I knew that I left it at somewhere between 60% and 70% charge so I was confident to be able to use it, today (--05-01).

However, when I just turned it on, the battery was at 8%!

Note that the plot doesn't show the actual change of the battery's charge. Only the black dots are actual measurements. Unfortunately, it seems like it's not possible to make the line connecting the dots go away. There are no dots on that long slope because no measurements have been taken on it as the laptop was off during that time.

Why is this? Does it mean that the battery is already pretty much dead? What is going on?

Edit: The problem persists. I had my laptop turned off for a little over a day and the battery's charge dropped by 20 percentage points!

closed as too broad by Ƭᴇcʜιᴇ007, fixer1234, Run5k, Pimp Juice IT, Steven May 4 '17 at 17:11

Please edit the question to limit it to a specific problem with enough detail to identify an adequate answer. Avoid asking multiple distinct questions at once. See the How to Ask page for help clarifying this question. If this question can be reworded to fit the rules in the help center, please edit the question.

  • This is something I would expect to see if it was in sleep mode. It wasn't by chance right? – Tim G. May 1 '17 at 14:26
  • @TimmyJim It was definitely fully turned off. I know this for sure because it has an LED which flashes every few seconds and I would definitely have noticed that when trying to sleep. I always turn my laptops fully off when going to sleep because otherwise I will notice the light flashes all the time. I really don't like light flashes when trying to sleep. – UTF-8 May 1 '17 at 14:37

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