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extremely slow X270 on battery

X230-X280, X390 Series
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Darekyl
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Joined: Tue Jul 27, 2021 2:04 pm
Location: Czech republic, Liberec

extremely slow X270 on battery

#1 Post by Darekyl » Fri Sep 30, 2022 9:54 am

Hello, i have a X270 and i bough an aftermarket 9- cell battery for it. The problem is, that as soon as the computer recognizes it, it throttles down to exactly 0,39GHz. I checked in Lenovo Vantage and the battery doesn't have a firmware number. Is there a way to get around it, is the thinkpad just picky or should i just return the battery?
Thanks
ThinkPad x270

RealBlackStuff
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Re: extremely slow X270 on battery

#2 Post by RealBlackStuff » Fri Sep 30, 2022 12:02 pm

Is that under any OS?
(Or just under W10/W11...)
Lovely day for a Guinness! (The Real Black Stuff)
Lenovo: X240, X250, T440p, M900 Tiny (all with W7/SP1)

dr_st
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Re: extremely slow X270 on battery

#3 Post by dr_st » Fri Sep 30, 2022 12:06 pm

Welcome to the dreaded X270 battery throttle bug. :(

https://www.google.com/search?q=x270+battery+throttle
Thinkpad 25 (20K7), T490 (20N3), Yoga 14 (20FY), T430s (IPS FHD + Classic Keyboard), X220 4291-4BG
X61 7673-V2V, T60 2007-QPG, T42 2373-F7G, X32 (IPS Screen), A31p w/ Ultrabay Numpad

Darekyl
Posts: 12
Joined: Tue Jul 27, 2021 2:04 pm
Location: Czech republic, Liberec

Re: extremely slow X270 on battery

#4 Post by Darekyl » Fri Sep 30, 2022 12:30 pm

It seems that even engineers at lenovo make mistakes (or are just a bunch of assholes). It's impressive how i completely missed this.
ThinkPad x270

Darekyl
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Joined: Tue Jul 27, 2021 2:04 pm
Location: Czech republic, Liberec

Re: extremely slow X270 on battery

#5 Post by Darekyl » Fri Sep 30, 2022 12:35 pm

Does anyone have a fix?
ThinkPad x270

RealBlackStuff
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Re: extremely slow X270 on battery

#6 Post by RealBlackStuff » Sat Oct 01, 2022 12:31 am

I haven't read everything about that bug, but if it indeed stops if you move the battery-lock-slider, you could try and go a step further by completely removing that slider.
For that you probably need to take the whole laptop apart, but if it is no longer under warranty, so what?
You can then hold the battery in place with electricians tape or similar.
Lovely day for a Guinness! (The Real Black Stuff)
Lenovo: X240, X250, T440p, M900 Tiny (all with W7/SP1)

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