07-22-2019 06:07 AM
I have a T480s ( product number 20L8S5F206) that I have from new for several weeks now. I noticed that the battery is draining while the laptop is connected to the charger.
The charge thresholds are 40-80 as shown in the attached screenshot.
I tried to disconnect the charger, use the laptop till it gets below 40 and then keep it on charge. It can get up to 79% and then starts draining.
Any idea on what to do?
P.S. I have done a battery gauge reset on the 24th of June.
07-22-2019 08:56 AM
I checked my T480s by setting a 40/80% charge threshold. The battery was already at 100% so I let it drain to 71% then plugged it in. Now it has stayed at 71% for the last 90 minutes so I don't think I'm seeing the problem you reported. Is there any possibility that your AC adapter is going bad? Do you have another one you can try? I can't think of what else could cause this kind of problem.
Does the same problem happen if you set a different charge threshold, such as 85/95%?
07-22-2019 09:09 AM
The AC adapter is definitely on the suspect list. However, I do not have another one to test.
I am currently using the 45W charger and my Laptop's specs are:
16 GB RAM
Maybe this kind of specs require the 65W adapter?
If yes, then why Lenovo didn't ship one by default?
I haven't tried other threshold settings. Will def try that as well.
btw, I have been using the laptop for more than 2 hours now and it is still at 69% charge (was using it on battery power for a few minutes earlier). The number didn't drop yet from 69, this is driving me nuts as I really can't figure out why it went
09-02-2019 09:21 AM
Have you managed to find a solution. I am facing the same problem. I have brand new t480s and battery percentage decreses by 1% every couple of hours. I also have 45W charger which came in the box. My laptop has i7-8650u, intel graphics card and FHD.