01-19-2019 07:58 AM
New weirdness with my T480 battery system.
I was using it from battery this morning having left it almost fully charged the night before.
After about 45 minutes use I got low battery warning ... hmmmmmmmmmmmm
I should have plenty of battery left ... what's up.
From the status bar it reported:
Battery 1: 19%
Battery 2: ZERO %
I plugged it in and battery #2 immediatly jumped from zero to a reported 58% charge level.
What the heck? Unit is only ~7 months old.
01-20-2019 02:28 AM - edited 01-20-2019 02:31 AM
I have exactly the same problem practically every time I run my laptop on battery. I reported it to Lenovo and they refused to investigate farther from asking me to check if my battery does good contact. My laptop is of similar age and has no physical damage.
It gets even funnier when one of your batteries is genuinely discharged and you get this problem. The computer immediatelly decides it's time to hibernate. Imagine if this happens during a presentation: "Excuse me, my $2k+ premium business laptop sucks it big."
01-20-2019 06:08 AM
In the past I have intermittantly gotten errors from the battery recalibration tool on this battery.
I guess it's time for me to document the issue and see if Lenovo will give me a new battery.
01-20-2019 12:13 PM
I actually made a post about this issue occuring on my A485, that said, mine jumps down to 5% but the general behaviour upon replug is about the same.
01-20-2019 12:15 PM - edited 01-20-2019 12:16 PM
as a WORKAROUND, set your critical battery to 4%, your having the exact same issue I made in my A485 post, it drops to 5% battery which is below the critical battery threshold
EDIT: post maddness, meant to edit my prior reply not make a quick reply...
01-20-2019 01:24 PM
02-09-2019 02:30 PM
As the person in charge for buying IT equipment in my company, Lenovo lost a client with this type of behavior.
We wanted to buy a series of T480 for our employees, as the swap able battery was a great investment from our point of view.
* Reduced wear on the internal one
* Allowing those that needed it, to use the 72Wh version
But on a few test laptops, we noticed after the battery drained in shutdown ( Windows Fast boot! Darn you Microsoft ), that it was strange how the internal battery already had such amounts of wear on those laptops.
After some testing and searching, this topic and other came up. I was also so my understanding that the internal battery was a "backup" and the external wears down first. But seeing this "level" wearing on both batteries, its something that it not acceptable for us.
Its easier and cheaper to replace the external batteries. We can even recover the 24Wh versions from people who wanted to upgrade to the 72Wh version. So our goal was to always had some spare batteries or extra travel batteries.
I have personally seen on one of our test laptops internal battery hit 0%. Before switching over to the external battery. So far for hot swap on the batteries.
For our colleagues at Lenovo: let me state clearly that we are now looking at Dells XPS's for our personnel. While the hot swap is still a good thing, the fact that we are now trading longevity and increased risk on the internal batteries from being worn more. The risk that somebody who does not know this issue, may want to do a hot swap, what in turn can result in data loss. This is not acceptable to us. Sorry, then we can just as well order laptops with "by default" more and better battery life on the internal battery and our personnel know to stop using the laptop or it goes into power down from itself.
I hope the extra warranty saved on the batteries was worth it. And yes, this was not the only factor but one of several. The badly designed expand ability of the internal storage was also one of those points. M.2 2280 specialized connector or 2.5inch SSD ( 70$ extra cost just to switch to a 2.5" storage on systems with the 1 m.2 2280 ). Not exactly great choice. I have seen better storage options from cheap Asus laptops that cost half the price. The bad thermal/fan management. And some more issue points...
Wishing you the best of luck at Lenovo.