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4 Posts

01-30-2018

NL

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  • Message 21 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-10-02, 17:50 PM

This feature should have been here from the beginning. I have a T470 and would realy appreciate it if my external battery drains before the internal one. Not only becouse the the external battery is easyer to replace also becouse it makes hot swapping work better.

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86 Posts

11-04-2013

CA

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  • Message 22 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-10-02, 21:41 PM

Via the Lenovo vantage app a BIOS update for my T480 has just been released. In the release notes it says that this update will also allow for battery firmware to be updated via Windows Update.

 

I just did the BIOS update as well as the Windows Update. After doing this, it appears that the dicharging sequence MAY have been corrected because my T480 is now discharging the external battery even though it has a higher cycle count. Just minutes before doing the update, my system was discharging from the internal battery, but after rebooting my system, it is now consistently discharging from the external battery. I will continue to monitor this over the next few days to see if they have truly fixed this issue. If anyone else can do the same and report back, that would be great.

ThinkPad T480 | i7-8650u | 32GB | MX150 | WQHD | 72wh
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86 Posts

11-04-2013

CA

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  • Message 23 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-10-03, 20:13 PM

I withdraw my initial observation in the previous post... my T480 is still discharging the internal battery first. Don't know how much longer we'll have to wait until Lenovo listens to our request for this to be changed.

ThinkPad T480 | i7-8650u | 32GB | MX150 | WQHD | 72wh
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1 Posts

10-07-2018

US

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  • Message 24 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-10-07, 5:02 AM

Chiming in here that I also expected this feature.

 

Replacing the external battery due to it wearing out is obviously much easier than replacing the internal one.  Please give us the ability to configure this in the Vantage app or at least the BIOS.

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4297 Posts

11-18-2012

US

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  • Message 25 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-10-31, 8:53 AM


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21 Posts

11-05-2018

CA

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  • Message 26 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-11-05, 18:49 PM

Same here. It should be an easy fix, but (for some reason) Lenovo has not released the fix, yet.

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127 Posts

02-08-2011

CA

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  • Message 27 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-11-08, 14:36 PM

This feature request seems essential for a product like the T470 and T480. The T480 promo material even says "It allows you to swap out a battery and replace it with a fully charged one—without having to turn your machine off." Nothing about discharging the internal battery first to undermine this feature, though.

 

"Fortunately" in my search for a  replacement  for my T440s (which does discharge the external battery first) I see that the T480s and the X1 Carbon only have one big internal battery, so for those looking at the thinner and lighter models, this issue is moot.

 

But for T470/T480 owners this wear leveling across very different batteries is inexplicable ... or at least remains unexplained.

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21 Posts

11-05-2018

CA

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  • Message 28 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-11-08, 14:56 PM

The other day I was using the laptop and discharing the battery. The internal went down to 5% and then the external started discharging. I believe that when the external is discharged, then a new external can be used and this could be repeated. However, what I do not like is the fact that the internal battery is going to deteriorate faster in this way, and it's much harder to replace the internal than the external battery with a new one. Perhaps Lenovo wants customers to pay for the replacement of the internal battery by forsing it to last shorter.

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127 Posts

02-08-2011

CA

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  • Message 29 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-11-08, 17:47 PM

From the previous posts, it seems like they are "wear-leveling" the two batteries, so sometimes the internal battery needs to be discharged all the way down before more wear is incurred on the external one.  In my view that defeats the whole design!

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19 Posts

05-19-2016

US

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  • Message 30 of 49

Re: T470 - Choose to drain external battery first [Feature Request]

2018-11-08, 18:20 PM

The wear-leveling explanation makes sense. What does not make sense is a) doing this with one easily removable battery and one that is a lot harder to replace; and b) not letting users decide for themselves if they want that to happen.

 

What is impossible to explain as anything but corporate arrogance is their refusal, as far as I can tell, to even answer the questions that I and many others have asked.

 

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