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24 Posts

02-26-2017

United Kingdom of Great Britain and Northern Ireland

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  • Message 1 of 5

Battery %

2020-04-11, 9:28 AM

Hi

 

I use a Lenovo P52s with an external battery. The total percentage charge left is 60%  but I am getting different % showing on the two batteries. Can someone please explain how this works-see screen shot below 

 

Thank you

 

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438 Posts

07-08-2019

Canada

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  • Message 2 of 5

Re:Battery %

2020-04-11, 20:01 PM

Hi umeshg12,

 

@ umeshg12 wrote:
 

 

Hi

 

I use a Lenovo P52s with an external battery. The total percentage charge left is 60%  but I am getting different % showing on the two batteries. Can someone please explain how this works-see screen shot below 

 

Thank you

 

From what I see, the P52s will discharge the external battery before using the internal one. It makes sense as you can then detach it and make the setup lighter, or attach another external battery to extend the machine's runtime. The total percentage applies to the sum of the energy of the connected batteries to let you know what use time you have left. 

 

Is it the information you needed, or is there something else I can help you with?

 

If your question has been answered, please mark it as Solved.

 

Thanks,
Martin

Using Browser Search to find your answers in Lenovo and Moto Community

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Main: P52 (I7-8750H P1000 FHD 16GB 2TB-SSD 1TB-HDD)
Also, 2x M820z, 1x P520c, 1x ideaCentre 300S-11IBR

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24 Posts

02-26-2017

United Kingdom of Great Britain and Northern Ireland

48 Signins

522 Page Views

  • Posts: 24
  • Registered: ‎02-26-2017
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 522
  • Message 3 of 5

Re:Battery %

2020-04-12, 7:39 AM

Hi Martin

 

Thank you for your reply.  One battery is showing 99% and the other battery is showing 15% . Is the laptop taking the average % of the two batteries to come to 60% 

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438 Posts

07-08-2019

Canada

649 Signins

7723 Page Views

  • Posts: 438
  • Registered: ‎07-08-2019
  • Location: Canada
  • Views: 7723
  • Message 4 of 5

Re:Battery %

2020-04-13, 2:48 AM

Hi umesh12,

 

@ umeshg12 wrote:
 

 

Hi Martin

 

Thank you for your reply.  One battery is showing 99% and the other battery is showing 15% . Is the laptop taking the average % of the two batteries to come to 60% 

I would expect the equation to be: 

 

(remaining1Wh + remaining2Wh) / (full-cap1Wh + full-cap2Wh) = Total-remaining-%

 

Example for battery1: 24.92 Wh / 25.19 Wh = 0.99, the same as reported. 

 

I cannot do the example with battery 2 as both are not visible on your image, but the math should be good. It is not a plain average because both batteries don't have the same actual capacity, but it is a remaining percentage of the total battery capacity.

 

Martin

Using Browser Search to find your answers in Lenovo and Moto Community

I'm a volunteer, NOT a Lenovo employee.
If I solved your issue, please click Accept as a Solution.
If my post helped, consider giving me a Thumbs Up.

Main: P52 (I7-8750H P1000 FHD 16GB 2TB-SSD 1TB-HDD)
Also, 2x M820z, 1x P520c, 1x ideaCentre 300S-11IBR

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24 Posts

02-26-2017

United Kingdom of Great Britain and Northern Ireland

48 Signins

522 Page Views

  • Posts: 24
  • Registered: ‎02-26-2017
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 522
  • Message 5 of 5

Re:Battery %

2020-04-13, 6:41 AM

Hi Martin

 

Thanks for explaining. It now makes sense

 

Really appreciate it 

 

Stay Safe

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