I have a Lenovo Y40-80 that I purchased two years ago. About a year ago exactly, I had to replace the battery because it no longer charged. Fast forward to now, I have replaced the display on the laptop and only a week or so ago replaced to HDD with a Samsung Evo SSD and reinstalled both Windows 8.1 and Ubuntu 16.04.3 from scratch.
The battery seemed to work well for the first couple of days (and even lasted much longer than before), but over the last couple days, the battery percentage has been reading as 100% for the first 2-3 hours, then very quickly draining down to about 25-30% within the next 2 hours, then running out of power completely. So clearly the battery life itself is not much of an issue, but the incorrect reading is more than a little inconvenient.
What I have done:
-Installed the necessary drivers from Lenovo's website (did this the first day)
-attempted to recalibrate the battery by charging it completely and then letting it drain to 0 and recharging again without letting it fall asleep
Also, the issue is persistent in both Windows and Ubuntu which makes me think it's either a firmware issue or an issue with the battery itself, but like I said before, the battery life is actually quite good compared to what I had before, but I'd really like to get this readout to be more accurate.
Any ideas, troubleshooting steps etc. are greatly appreciated!
Edit: While trying to troubleshoot something else, I disabled Fast Boot in Windows, rebooted into Ubuntu, and the battery meter now seems to be discharging normally. I don't want to rush to conclusions, but I'm taking this as a positive sign. I'll try booting into Windows after a while to see if it's reading correctly now too.
Edit 2: it looks like that optimism was ill-fated, we're back to reading incorrectly again and I'm pretty much out of ideas
The battery seemed to work well for the first couple of days (and even lasted much longer than before), but over the last couple days, the battery percentage has been reading as 100% for the first 2-3 hours, then very quickly draining down to about 25-30% within the next 2 hours, then running out of power completely. So clearly the battery life itself is not much of an issue, but the incorrect reading is more than a little inconvenient.
What I have done:
-Installed the necessary drivers from Lenovo's website (did this the first day)
-attempted to recalibrate the battery by charging it completely and then letting it drain to 0 and recharging again without letting it fall asleep
Also, the issue is persistent in both Windows and Ubuntu which makes me think it's either a firmware issue or an issue with the battery itself, but like I said before, the battery life is actually quite good compared to what I had before, but I'd really like to get this readout to be more accurate.
Any ideas, troubleshooting steps etc. are greatly appreciated!
Edit: While trying to troubleshoot something else, I disabled Fast Boot in Windows, rebooted into Ubuntu, and the battery meter now seems to be discharging normally. I don't want to rush to conclusions, but I'm taking this as a positive sign. I'll try booting into Windows after a while to see if it's reading correctly now too.
Edit 2: it looks like that optimism was ill-fated, we're back to reading incorrectly again and I'm pretty much out of ideas