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34 Posts

02-24-2021

United Kingdom of Great Britain and Northern Ireland

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  • Message 1 of 15

Battery questions

2021-02-26, 15:11 PM

Hi, I've had my ThinkBook for just over two weeks and have two questions regarding the battery:

 

1. It has already gone through 11 battery cycles and the full charge capacity is now at 42.8wh, when the designed capacity is 45wh. Is this normal?

 

2. If I have my Laptop plugged in to AC with the adapter, once the laptop gets to 100% charge, is the laptop then running directly off AC power, or will the battery be constantly being used and recharged?

 

 

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792 Posts

04-21-2020

Turkey

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Ynt::Battery questions

2021-02-26, 15:51 PM

Yes, that's what I meant! :)

Also it doesn't have to be 100%, if you set battery tresholds (let's say: start @ 55, stop @ 60),

computer will start charging battery if the battery power is below 55% and it will stop charging at 60% (and if it's not below 55% it won't start charging),

it will use AC adapter's power to run.

 

I think ThinkPads and some ThinkBooks (but this can vary, I am not sure, do not want to mislead) have this feature  of custom charge-limits. If your system is up-to-date and supports this feature, you can use it. If not, you can still use Conservation Mode to prolong battery life

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792 Posts

04-21-2020

Turkey

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  • Message 2 of 15

Re:Battery questions

2021-02-26, 15:31 PM

Hello,

1. it seems normal

2. no, it will use wall charger to run and charge the battery. When battery charge treshold or 100% is met, it will stop charging. I wouldn't recommend going %0 - 100 - 0 - 100, if you need battery power very much, I recommend you to prefer % 20 - 95 (or use battery charging tresholds in Lenovo Vantage or TLP)

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34 Posts

02-24-2021

United Kingdom of Great Britain and Northern Ireland

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  • Posts: 34
  • Registered: ‎02-24-2021
  • Location: United Kingdom of Great Britain and Northern Ireland
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  • Message 3 of 15

Re:Battery questions

2021-02-26, 15:37 PM

Hello, thanks for your reply.

 

So, if my laptop is plugged in to AC and gets to 100%, the AC will stop supplying the battery and will instead directly power the laptop - is that what you mean?

 

The only battery charge threshold I can see is in Lenovo Vantage, but it does not go to 95%, but to 60% - see attached image.

 

 

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792 Posts

04-21-2020

Turkey

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  • Message 4 of 15

Ynt::Battery questions

2021-02-26, 15:51 PM

Yes, that's what I meant! :)

Also it doesn't have to be 100%, if you set battery tresholds (let's say: start @ 55, stop @ 60),

computer will start charging battery if the battery power is below 55% and it will stop charging at 60% (and if it's not below 55% it won't start charging),

it will use AC adapter's power to run.

 

I think ThinkPads and some ThinkBooks (but this can vary, I am not sure, do not want to mislead) have this feature  of custom charge-limits. If your system is up-to-date and supports this feature, you can use it. If not, you can still use Conservation Mode to prolong battery life

0 person found this solution to be helpful.

This helped me too

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34 Posts

02-24-2021

United Kingdom of Great Britain and Northern Ireland

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  • Posts: 34
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  • Message 5 of 15

Re:Battery questions

2021-02-26, 15:54 PM

Thank you for your help!

 

I don't think I have custom limits on my machine, so will just use the Conversation mode :)

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792 Posts

04-21-2020

Turkey

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  • Message 6 of 15

Re:Battery questions

2021-02-26, 15:56 PM

You're welcome! Glad to be help. Feel happy while using it:)

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1 Posts

02-18-2020

United States of America

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  • Message 7 of 15

Re:Battery questions

2021-03-07, 19:35 PM

Hello, thank for the question and answers. Just to be clear, are you saying that it is ok to leave the Laptop plugged in all the time without this creating a negative effect to the battery life?

 

 

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792 Posts

04-21-2020

Turkey

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  • Message 8 of 15

Ynt::Battery questions

2021-03-07, 20:01 PM

@ wellz wrote:

Hello, thank for the question and answers. Just to be clear, are you saying that it is ok to leave the Laptop plugged in all the time without this creating a negative effect to the battery life?

 

 

 

Short answer is yes! Long answer depends on the device, but if it's plugged ALL the time, conservation mode (or charge tresholds %55-60) is perfect for most users. No matter what your battery will eventually die, this just prolongs its life.

 

You can refer to this article:

Battery: Questions and Answers  https://pcsupport.lenovo.com/solutions/ht509084-battery-qa

 

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34 Posts

02-24-2021

United Kingdom of Great Britain and Northern Ireland

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  • Message 9 of 15

Re:Battery questions

2021-03-08, 12:45 PM

Is it normal for the battery to discharge by around 1% every 1-2 days, even if it is using AC power? Because that's what mine seems to do.

@ugurcansayan 

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792 Posts

04-21-2020

Turkey

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  • Registered: ‎04-21-2020
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  • Message 10 of 15

Ynt:Battery questions

2021-03-08, 15:16 PM

Hello

 

I am not sure this is how it's meant to work. Please check your power and battery settings, make sure you have all drivers and they are up-to-date from pcsupport.lenovo.com, Lenovo Vantage and/or Lenovo System Update and Windows Update. You can install Lenovo System Interface Foundation in case of Vantage has this missing. You may also want to run an hardware scan in Vantage or BIOS utility in order to diagnose if battery/AC has issues.

This is kind of general trouble-shooting procedure and solves almost every firmware&software problems

 

Can you share your ThinkBook's MTM number if this issue persists so we can look into this behaviour?

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