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3 Posts

09-30-2017

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Battery issues about my t470

2017-09-30, 16:22 PM

i got my T470 few weeks ago

every thing works just fine

but i found a problem

 

The internal battery discharge before the external battery

 

so what's the point with hot swap?

 

i won't be able to swap the battery without take the risk of shutting down, because of external battery don't work unless the internal battery down to 5%

 

is there any solution to fix the problem?

1:like making the external battery discharge first

or

2:discharging alternately between both internal and external battery every 5%

 

I did some research online

Knowing that is not as easy as typing some code in the shell or some settings I can find in the system

Battery runs even before the operating system

It probably need a BIOS update to fix that

Really wise that my message could go to the engineer

So they can start trying to solve this

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33 Posts

10-30-2015

NL

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Re: Battery issues about my t470

2017-10-01, 9:55 AM

Same issue here. Looks like it started with one of the recent BIOS updates.

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386 Posts

03-03-2017

JP

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Re: Battery issues about my t470

2017-10-10, 9:57 AM

Dear T470 users,

In case your Windows 10 version is 1703 (aka RedStone2) and you see the battery remaining capacity from Windows battery gauge at Taskbar, Battery 1 and Battery 2 are shown swapped.

I'd like you to confirm the battery information and status by the Lenovo Settings instead of Windows battery gauge.  Lenovo Settings can handle battery 1 and battery 2 information properly on any Windows version.

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3 Posts

09-30-2017

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Re: Battery issues about my t470

2017-10-15, 5:08 AM

 

u sure about that?

actually i don't really care about if the battery numbers are shown right or wrong

is about the battery discharging order

if i can't freely replace my external battery without risking shutdown

("freely" means to me is the internal battery should not be discharging before the external battery drain out, so that i can replace external battery with a fully charged one, without shutting down my laptop or risking to shutdown accidentally)

if the internal battery discharge before the external battery

what's the point of the idea of hot swap, that the idea Lenovo has been telling about

 

so i really need to spell it?

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7557 Posts

01-13-2008

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Re: Battery issues about my t470

2017-10-15, 5:00 AM

The large print: please read the Community Participation Rules before posting. Include as much information as possible: model, machine type, operating system, and a descriptive subject line. Do not include personal information: serial number, telephone number, email address, etc.


The fine print: I do not work for, nor do I speak for Lenovo. Unsolicited private messages will be ignored - questions and answers belong in the forum so that others may contribute and benefit. ... GeezBlog

 

Communities: English Deutsch Español Português Русскоязычное Česká Slovenská Українська Polski Türkçe Moto English

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33 Posts

10-30-2015

NL

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  • Message 6 of 25

Re: Battery issues about my t470

2017-10-15, 11:02 AM

I think it has been already established in other threads that batteries get discharged based on their wear levels and not external first. I can confirm this behaviour on my T470 with latest BIOS v1.42. It alternates dicharging batteries between internal and external first. This is very annoying since this indeed diminishes the usefulness of having a hot swappable battery.

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15 Posts

10-27-2017

RU

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  • Message 7 of 25

Re: Battery issues about my t470

2017-10-28, 15:00 PM

Count me in as well. Typing this post with 39% on internal battery and 99% on removable (which already has 1% wear - on a laptop just I bought two days ago).

This makes PowerBridge just useless. I can understand this behaviour on T470s for example, but I chose T470 because of Powerbridge feature - which I cannot really use.

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3 Posts

11-03-2017

DE

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  • Message 8 of 25

Re: Battery issues about my t470

2017-11-05, 0:20 AM

Same problem here!

Why isn't there any BIOS update like it was on the T460 with exactly the same issue?

Sounds to me like planned obsolescence and this would be very sneaky by Lenovo.

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386 Posts

03-03-2017

JP

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  • Message 9 of 25

Re: Battery issues about my t470

2017-11-05, 23:20 PM

Dear customers,

development team identified the issue and is preparing the solution on this battery charge thresholds issue.

Please wait for a moment.

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2 Posts

11-06-2017

DE

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  • Message 10 of 25

Re: Battery issues about my t470

2017-11-06, 11:11 AM

Dear "support",

sorry for being that annoyed, but i searched for a simple straight forward mail form or even some of these old fashioned email adresses to use in my favourite mail app... seems like you hide that stuff pretty well to guide users to your "repair ticket service" where they need to create another account. nevermind...

 

I experience the issues mentioned above. Im not using windows 10, im using linux mint 18.1 with an linux 4.11.0-14 kernel.

Additionally, as soon as one battery (obviously the internal) are on 5%, the cpu is throttled to 400mhz.

This also sometimes happens of both batteries ar above 90%, its just super annoying because the computer is not usable with 400mhz...

If there is no easy solution, please contact me to find a solution.

 

Moderator edit by bananaman: Masked member's email address to prevent it from being scooped up by the SPAM crawlers. Please use the private Message (PM) feature instead. Click on the member's name>Send this user a private message.

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3 Posts

11-03-2017

DE

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  • Message 11 of 25

Re: Battery issues about my t470

2017-11-06, 13:42 PM

Very glad to hear that. I'm looking forward to this update.

Thx very much Lenovo

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1 Posts

11-30-2017

US

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  • Message 12 of 25

Re: Battery issues about my t470

2017-11-30, 7:01 AM

Thank you Rydeen. Waiting patiently, just checking if there was any update or rough timeframe (weeks or months)?

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386 Posts

03-03-2017

JP

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  • Message 13 of 25

Re: Battery issues about my t470

2017-11-30, 7:51 AM

Dear customers,

as I checked, next week end (Dec. 8, 2017) is the release target date.  Stay tuned.

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15 Posts

10-27-2017

RU

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  • Message 14 of 25

Re: Battery issues about my t470

2017-12-08, 21:55 PM

So as Rydeen posted, the BIOS update was indeed published today, version 1.43-1.29

However, changelog only reads this:

 

<1.43>
UEFI: 1.43 / ECP: 1.29
- (Fix) Fixed an issue where fan might rotated with max speed due to not reading CPU
temperature correctly.
- (Fix) Fixed an issue where PCI LAN might disappeared on boot menu after SCCM OS deployment.
- (Fix) Fixed an issue where system might not boot to OS when attached an external monitor
and its USB3 devices.
- (Fix) Fixed an issue where network boot might happened at reboot after resume from suspend
by Wake On LAN.

 

I can't see anything in regard to battery issues we are discussing (I didn't update my system just yet).

Can you check/confirm that is fixed?

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386 Posts

03-03-2017

JP

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  • Message 15 of 25

Re: Battery issues about my t470

2017-12-11, 0:11 AM

I'm sorry to confuse you.

The battery charge threshold issue solution will be provided by Lenovo Companion, not by BIOS.

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Re: Battery issues about my t470

2017-12-12, 20:23 PM

Hello,

 

I would like to ask when the mentioned fix will be released?

As for now nothing has changed unfortunately. It makes no sense to discharge the internal battery first. 

I've bought a double-battery notebook mainly to be able to replace external battery while still working.

Now it's not possible.

 

T470 20HD, BIOS 1.43

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3 Posts

11-03-2017

DE

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  • Message 17 of 25

Re: Battery issues about my t470

2017-12-12, 21:24 PM

Same here. Nothing has changed so far...

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Re: Battery issues about my t470

2017-12-20, 22:28 PM

Dear Lenovo Team,

 

Could you please provide us with any information about a status of this issue?

Is it going to be resolved?

 

 

 

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18 Posts

12-22-2017

FR

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  • Message 19 of 25

Re: Battery issues about my t470

2018-01-01, 15:49 PM

Dear Lenevo team,

I am wondering about the same thing. Hope you can update us with the situation.

 

Thank you in advance

 

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386 Posts

03-03-2017

JP

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  • Message 20 of 25

Re: Battery issues about my t470

2018-01-08, 4:49 AM

Dear customers,

As my understanding, the solution will be included in the Lenovo Vantage (used to be called as "Lenovo Companion").  If your system is not updated to Lenovo Vantage, please visit Microsoft's Windows Store and get it to update.

 

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2 Posts

11-06-2017

DE

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  • Message 21 of 25

Re: Battery issues about my t470

2018-01-08, 15:14 PM

He everybody.
Its a pitty, that the only information available is a fix in the companion application (which is only available for windows, although the t470 model officialy supports linux (ubuntu) and a lot of customers dont use any windows).

 

For me the issues where fixed after calling the lenovo support:

1. I called them and pretty fast they suggested to change both batteries (internal & external)

2. After the batteries where send out, a local technican called me to arrange an appointment

3. He replaced both batteries

4. I did a hard reset by pressing the emergency reset button (little hole in the ground cover)


Since then (~2 month ago) the external batterie uncharges first and i never experienced the cpu throttling anymore.

The second issue seems to be connected to the first because the cpu is throttled if the overall batterie load is below 6%.

Also the fix seems to not rely on a specific os.

 

For me there where no additional costs because of the warranty.


For everybody without any warranty coverage i would suggest to nevertheless call lenovo because this seems like an issue in older batteries and they may be accommodating.

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