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T470s Battery/Power Issue

T430 and later, plus T530 and later series specific matters only
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dylanb02k
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T470s Battery/Power Issue

#1 Post by dylanb02k » Sun Jan 20, 2019 9:34 pm

Weird issue that I've started to have with my T470s....

Whenever I unplug the power source it shuts off immediately. If I turn it on with battery, it seems to work normally.

There also appears to be a similar issue where it turns off the moment it switches from Battery 1 to Battery 2 (which seems to always say 90% and not charging).

Any ideas what I could do to debug this?

dr_st
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Re: T470s Battery/Power Issue

#2 Post by dr_st » Mon Jan 21, 2019 7:36 am

Welcome to the forum. :)

I suspect Battery 2 may be faulty. Is there a way in the BIOS to disable it so you could test this theory?
Thinkpad 25 (20K7), X1 Carbon (20HQ), 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, A21m 2628-GXU

dylanb02k
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Re: T470s Battery/Power Issue

#3 Post by dylanb02k » Mon Jan 21, 2019 10:32 am

I selected "Disable Built In Battery" in the BIOS and you seem to be correct. Now if I unplug the machine, it doesn't cut out. There's a note that the battery will be re-enabled on connection to AC Power, does this mean I would have to do this every time?

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Re: T470s Battery/Power Issue

#4 Post by dr_st » Mon Jan 21, 2019 11:15 am

Hard to know. I must confess that I am not experienced enough with how these dual battery algorithms work on modern Thinkpads.

In any case, it is probably a good idea to replace the faulty battery.
Thinkpad 25 (20K7), X1 Carbon (20HQ), 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, A21m 2628-GXU

dylanb02k
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Joined: Sun Jan 20, 2019 9:29 pm
Location: Cleveland, OH

Re: T470s Battery/Power Issue

#5 Post by dylanb02k » Mon Jan 21, 2019 11:50 am

Yep. Actually seems to have fixed the AC Power issue after that tweak in the bios (even though the 2nd battery displays again).

I installed the Vantage software to track the battery and battery 2 does display as poor condition.

Image

Will a 2 yr Lenovo on site warranty cover battery issues? Or am I going to be on the hook to buy my own.

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Re: T470s Battery/Power Issue

#6 Post by RealBlackStuff » Mon Jan 21, 2019 11:52 am

Shouldn't that T470s "act" identical to a T25 with dual battery?
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dr_st
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Re: T470s Battery/Power Issue

#7 Post by dr_st » Mon Jan 21, 2019 1:18 pm

RealBlackStuff wrote:
Mon Jan 21, 2019 11:52 am
Shouldn't that T470s "act" identical to a T25 with dual battery?
Well, TP25 is like T470 (one internal, one external battery), not T470s (both internal); however, the algorithms are probably similar, I just never tested them.
Thinkpad 25 (20K7), X1 Carbon (20HQ), 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, A21m 2628-GXU

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