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1 Posts

05-14-2020

Germany

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  • Posts: 1
  • Registered: ‎05-14-2020
  • Location: Germany
  • Views: 5
  • Message 11 of 14

Re:Lenovo C940 battery degradation 7 % after 21 days

2020-05-14, 20:16 PM

Hi,

 

i have the same problem as you. I got my C940 in december of last year and my battery capacity has decreased to 51Wh since then. I dont't know why but it decreased especially fast over the last few weeks. This is in my oppinion not something that should happen. I currently need my laptop for for but as soon as possible, I will send it in to get it checked. I am very disappointed.

I added my battery history so you can have something to compare it to.

If someone has any idea why this happens I would appriciate it.

Battery capacity history

Charge capacity history of the system's batteries

PERIODFULL CHARGE CAPACITYDESIGN CAPACITY
2019-12-30 - 2020-01-0658.007 mWh60.000 mWh
2020-01-06 - 2020-01-1358.520 mWh60.000 mWh
2020-01-13 - 2020-01-2058.840 mWh60.000 mWh
2020-01-20 - 2020-01-2759.685 mWh60.000 mWh
2020-01-27 - 2020-02-0358.530 mWh60.000 mWh
2020-02-03 - 2020-02-1158.337 mWh60.000 mWh
2020-02-11 - 2020-02-1758.070 mWh60.000 mWh
2020-02-17 - 2020-02-2458.109 mWh60.000 mWh
2020-02-24 - 2020-03-0258.178 mWh60.000 mWh
2020-03-02 - 2020-03-1057.860 mWh60.000 mWh
2020-03-10 - 2020-03-1757.349 mWh60.000 mWh
2020-03-17 - 2020-03-2458.435 mWh60.000 mWh
2020-03-24 - 2020-03-3159.168 mWh60.000 mWh
2020-03-31 - 2020-04-0758.940 mWh60.000 mWh
2020-04-07 - 2020-04-1458.940 mWh60.000 mWh
2020-04-14 - 2020-04-2158.069 mWh60.000 mWh
2020-04-21 - 2020-04-2856.365 mWh60.000 mWh
2020-04-28 - 2020-05-0554.701 mWh60.000 mWh
2020-05-0551.260 mWh60.000 mWh
2020-05-0651.260 mWh60.000 mWh
2020-05-0751.260 mWh60.000 mWh
2020-05-0851.260 mWh60.000 mWh
2020-05-0951.260 mWh60.000 mWh
2020-05-1051.260 mWh60.000 mWh
2020-05-1151.283 mWh60.000 mWh
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1 Posts

07-31-2020

Australia

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  • Registered: ‎07-31-2020
  • Location: Australia
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  • Message 12 of 14

Re:Lenovo C940 battery degradation 7 % after 21 days

2020-07-31, 12:13 PM

I actually had the same issue, battery degraded more than 19% in 7 months with only 30 cycle count. Checked with lenovo and it is flagged that the battery should not perform like that at all. So in the end I got the battery replaced.

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170 Posts

04-26-2020

United Kingdom of Great Britain and Northern Ireland

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  • Posts: 170
  • Registered: ‎04-26-2020
  • Location: United Kingdom of Great Britain and Northern Ireland
  • Views: 1035
  • Message 13 of 14

Re:Lenovo C940 battery degradation 7 % after 21 days

2020-07-31, 16:14 PM

Is anyone finding the battery depleting while completely switched off?

 

I've done all the tweaks but still finding if I don't use the laptop for a week it loses approx 10% of the charge for no reason.

 

Be good to find out if this happens to anyone else before I go down the warranty route.

 

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131 Posts

11-12-2016

Croatia

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925 Page Views

  • Posts: 131
  • Registered: ‎11-12-2016
  • Location: Croatia
  • Views: 925
  • Message 14 of 14

Re:Lenovo C940 battery degradation 7 % after 21 days

2020-09-10, 20:16 PM

Same problem with my C930. Already replaced two batteries... this one is also degrading!

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