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5 Posts

07-27-2018

US

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ThinkPad T460s Battery Issues after BIOS Upgrade

2018-07-27, 15:25 PM

After upgrading the BIOS, I am having an issue with my battery.

 

I finally got around to troubleshooting an outstanding issue with my RAM (It was maxing out at 10 of my 20gb of RAM), I found that updating my BIOS resolved the issue. I purchased the laptop in May 2016, and this was the first time I had updated my BIOS. I used Lenovo Solution Center / Vantage to run the updates. I updated my BIOS to N1CET68W (6/20/18).

 

After updating the BIOS to solve one issue, it caused another. One of my batteries no longer works. Here's some additional details..

 

While troubleshooting I ran battery report, and I don't think it is a coincidence that the date I updated the BIOS on is also the date at which one of my batteries stopped working - Attached with a line drawn for when I updated the BIOS.

 

My battery now caps out at 62%. Battery 1: 68% and charging. Battery 2: 0%. Battery 2 will not charge any more.

 

Battery 1: 00HW022, Sanyo. Design Capacity: 23510 mWh, full charge capacity: 17840mWh (Acceptable degradation for 2 year old battery)

Battery 2: 01AV406, SMP. Design Capacity: 26060 mWh, full charge capacity: 1770mWh (Significant drop-off once BIOS updated).

 

I have already performed laptop surgery and made sure both batteries are connected. Unplugged both of them, and hard reset my laptop (holding power button for ~2 minutes with batteries out). I tried uninstalling and reinstalling the drivers, and then updating them.

 

Windows 10 x64. 

 

 

 

 

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434 Posts

05-28-2017

CA

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Re: ThinkPad T460s Battery Issues after BIOS Upgrade

2018-07-27, 18:36 PM

Some BIOS ROMs released actually have downgraded memory. I have seen that on more than a few machines.

 

You should by convention use RAM in pairs of the same make/model so that memory will run in dual channel mode with more aggregate bandwidth.

 

DDR2, DDR3 and DDR4 are all the same, use them in pairs

 

I own: T400 T500 X220 X230 all running Windows 10 Professional
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5 Posts

07-27-2018

US

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  • Posts: 5
  • Registered: ‎07-27-2018
  • Location: US
  • Views: 65
  • Message 3 of 3

Re: ThinkPad T460s Battery Issues after BIOS Upgrade

2018-07-27, 20:08 PM
My problem is not the RAM. The RAM was fixed after upgrading the BIOS. I can now use all 20gb.

My new problem is that upgrading the BIOS has broken one of my batteries.
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