probably related to this kernel bug though:

https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2059738

downgrading the kernel should fix it as a workaround it would seem.

the halt command is like a handbrake for the kernel, so it basically shuts everything down hard and stops, but it does not power off the system without you telling it to, so that is why your LEDs stayed on after you used the other parameter.

you could just try to downgrade/ upgrade the kernel, do s shutdown for a few hours during daytime when the computer is not beeing used, then turn it back on and check the percentage.

you will see the drain if it’s not a full night, but it might not be so drastic.

if it’s completely shut down there should be no loss in percentage, even for a short period of time as there probably is now…

I’ll try to think up another solution, but a bit busy today as I mentioned on the last post

Hi, a bit busy today so I can investigate some more later, but the problem you are describing is in many cases related to the kernel version and has been resolved by up or downgrading the kernel version.

it might be worth looking into, at least it’s a simple task, while I get some more time to investigate or offer more for you to look into.

great that it worked so far, at least now you know where the problem is :)

let’s hope it’s a software issue, in general it’s much cheaper to fix software than hardware 🙂

you can also try using the “sudo halt --poweroff” command.

if it ks software related. that command will force an instant shutdown ignoring all normal shutdown run levels (use with caution if you have open files that need to be saved in advance).

if that command succeeds as well after the battery test, you can be sure the problem lies within the shutdown run level scripts, which should help you narrow it down even more.

does this happen if you force it to shut down by holding the power button for +10sec, or if you remove and reinsert the battery after power off?

forcing a shutdown or removing and installing the battery, will ensure that the laptop is indeed shut down and not just halting during the shutdown process.

if you still have the same issue after this test I would guess your battery is dying, but if not you know that the issue is a software and not a hardware problem…

anyway, best of luck getting it sorted