English Community

ThinkPad NotebooksThinkPad: T400 / T500 and newer T series Laptops
All Forum Topics
Options

86 Posts

11-04-2013

CA

145 Signins

906 Page Views

  • Posts: 86
  • Registered: ‎11-04-2013
  • Location: CA
  • Views: 906
  • Message 91 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-07-31, 18:36 PM

Based on your numbers now, both your old/new external batteries should be discharging first. When you test it now is this the case?

 

As for before, its hard to tell if you didn't record the wear level. It could be that those numbers just recently updated to what they are now.

ThinkPad T480 | i7-8650u | 32GB | MX150 | WQHD | 72wh
Reply
Options

21 Posts

11-05-2018

CA

19 Signins

84 Page Views

  • Posts: 21
  • Registered: ‎11-05-2018
  • Location: CA
  • Views: 84
  • Message 92 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-07-31, 19:19 PM

In my case, B1 is 24.33 Wh (30 cycles) and B2 is 23.55 Wh (14 cycles). Thus, if the higher-charge battery is to drain first, then that would be B1, which is what is actually happening on my laptop. However, it is strange to see that the battery that has gone through more recharging cycles has higher charge capacity than the one the has gone through less recharging cycles - this indicates that the external batter (B2) is of poorer quality (both of them have gone throug a similar discharging regime, and definetely both of them have gone throug the same /computer-controlled/ charging regime).

Reply
Options

277 Posts

10-28-2016

US

473 Signins

2564 Page Views

  • Posts: 277
  • Registered: ‎10-28-2016
  • Location: US
  • Views: 2564
  • Message 93 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-07-31, 19:28 PM

The storage capacity of the batteries may not be recorded correctly...

you could run the battery calibration utility (in Vantage) to update it,

but then you'd think the discharge algorythm would not know that either and just work with the "published" values...

If my post helps a Kudo is appreciated, if I answer your question, please mark it ”Accepted Solution“ and give it a Kudo! ... Some years ago I worked for IBM. Currently I do not work for, nor do I speak for Lenovo or IBM.
Reply
Options

86 Posts

11-04-2013

CA

145 Signins

906 Page Views

  • Posts: 86
  • Registered: ‎11-04-2013
  • Location: CA
  • Views: 906
  • Message 94 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-07-31, 19:29 PM

It does seem counterintuitive. Could be that a  battery gouge is needed to get a more accurate reading?

ThinkPad T480 | i7-8650u | 32GB | MX150 | WQHD | 72wh
Reply
Options

277 Posts

10-28-2016

US

473 Signins

2564 Page Views

  • Posts: 277
  • Registered: ‎10-28-2016
  • Location: US
  • Views: 2564
  • Message 95 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-07-31, 19:30 PM

I only got the new battery a month or so ago, and have not put much cycling on the batteries since but the numbers I posted today are the only ones I have but should be very close to the 'current' values...

 

Not sure what happened ... but the internal battery WAS discharging first ...

Maybe adding in a 3rd battery to the "rotation" of recognized batteries has some impact?

 

beats me...  :-(

If my post helps a Kudo is appreciated, if I answer your question, please mark it ”Accepted Solution“ and give it a Kudo! ... Some years ago I worked for IBM. Currently I do not work for, nor do I speak for Lenovo or IBM.
Reply
Options

21 Posts

11-05-2018

CA

19 Signins

84 Page Views

  • Posts: 21
  • Registered: ‎11-05-2018
  • Location: CA
  • Views: 84
  • Message 96 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-07-31, 19:39 PM

I did run the battery callibration protocol. I will see what happens in the future, but Lenovo should let customers to decide which battery to drain first - this could easily be implemented in LV, but..... 

Reply
Options

1 Posts

08-03-2019

SE

3 Signins

95 Page Views

  • Posts: 1
  • Registered: ‎08-03-2019
  • Location: SE
  • Views: 95
  • Message 97 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-08-03, 20:56 PM

I would love this feature aswell, bought 2x 72 WH to be able to not wear down on internal battery, but it seams like it allways drains the internal battery first. 

Reply
Options

21 Posts

11-05-2018

CA

19 Signins

84 Page Views

  • Posts: 21
  • Registered: ‎11-05-2018
  • Location: CA
  • Views: 84
  • Message 98 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-08-04, 8:24 AM

Lenovo has, in a way, missled customers with the swapable battery design. It's a good idea for people that work a lot off-grid, but a number of customers bought these lap-tops to save the internal battery from extensive wear (in my case, that was one of the main motivations to by my T480).

However, what bothers me the most is Lenovo's lack of customer care - I have not been able to read any official reply from Lenovo regarding the issue discussed in this thread (and many other threads, in the past). Lenovo is still far from Apple when it comes to customer care (curently I have T480 and X230 Thinpads, 2 MBPs, 1 iMac and 1 Mac-mini, and I have detal with both company-support departments). Although I prefer Thinkpads for my official work, I believe this is the last Thinkpad I've bought. Good hardware, but very bad customer support (not only in relation to answering posts, but also I've had bad experiences when I used to call Lenovo for help with my X230).

Reply
Options

3 Posts

07-27-2017

CZ

10 Signins

90 Page Views

  • Posts: 3
  • Registered: ‎07-27-2017
  • Location: CZ
  • Views: 90
  • Message 99 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-08-15, 8:49 AM

Has this been solved yet?

 

My batteries state:

- BAT0: 24Wh (21.11Wh) 125 cycles -> 88% capacity (what? after so little cycles?)

- BAT1: 24Wh (20.66Wh) 114 cycles -> 86% capacity (what? after so little cycles?)

 

I tripple checked those numbers, BAT1 is EXTERNAL.

 

System discharges internal first!

 

How is it possible they designed a professional business notebook to discharge batteries so deeply and to charge them to 100%?

 

This wears the batteries so quickly!

 

I would have prefered having more batteries AND SWAP THEM, to have longer 'on battery' working time AS ADVERTISED.

 

Now swapping the external battery just kills my system.

 

I use Manjaro Linux on T480.

 

If I remove and reinsert the battery, it is not detected by the system immediately (hot swap), but only after sleep cycling the system. Hope this is not a problem as for the detecting and actually using the battery.

 

Waiting to be able to set the charge and discharge limits, as well as 'discharge external first' order.

 

Same goes for autodetect the inserted battery on Linux without a power cycle.

 

Thank you Lenovo!

Reply
Options

5 Posts

12-04-2018

US

4 Signins

60 Page Views

  • Posts: 5
  • Registered: ‎12-04-2018
  • Location: US
  • Views: 60
  • Message 100 of 108

Re: T480 battery discharge problem: internal battery goes first at all times!

2019-09-11, 16:29 PM

Lenovo quality has really gone down the last few years. I used to buy their systems because their parts were easy to replace and they well rounded and fully featured. Prior to the T480 I was using an X230 and W530. Compared to those, the T480 is trash. The speakers are so quiet I can't even hear them, and I hear the upward facing T490 speakers are equally bad. Making a thin laptop doesn't mean anything if its a terrible thing laptop cutting out a lot of essentials, due to thinness. These battery problems are a big issue too.

I've been using only Lenovo for about 9 years now, including my server, which is a Thinkserver, but I'm done with Lenovo for now. I feel like I threw my money away on the T480. My next laptop will be from Hauwei instead.

Reply
Forum Home

Community Guidelines

Please review our Guidelines before posting.

Learn More

Check out current deals!

Go Shop
X

Save

X

Delete