Take a look at our
ThinkPads.com HOME PAGE
For those who might want to contribute to the blog, start here: Editors Alley Topic
Then contact Bill with a Private Message

Problem with one of the batteries of the T450s

T430 and later, plus T530 and later series specific matters only
Post Reply
Message
Author
LawStudentWithThinkpad
Posts: 3
Joined: Wed Sep 11, 2019 10:47 pm
Location: Metro Manila, Philippines

Problem with one of the batteries of the T450s

#1 Post by LawStudentWithThinkpad » Wed Sep 11, 2019 11:07 pm

Hello, new member here. Been lurking but I decided to join after watching some youtubers mention this site.

So I have a T450s, nice machine running Windows 10 on a SSD. However, since switching workplaces and then entering law school I had to put it on the shelf for a year or so after having its PLEX/FLEX? cable repaired. Yesterday morning, when I booted it just to check some old files from my first workplace, there was a message that one/both of my batteries were not genuine Lenovo ones and it warned that it would not charge. When I got into the desktop, Battery 1 (is this the internal one?) was at 0% and not charging, and Battery 2 (I guess this is the external one?) was charging just fine. What could have caused this problem? It has never done this before. Do I have missing drivers, firmware, or did someone swap one of my batteries at the repair center without me knowing it? What are my options? Thanks for the helpful replies in advance.

P.S. Going to post images of said error on the screen later for reference.
I have a dream, that IBM will regain the rights to manufacture and sell Thinkpads. I have a dream, that we will get 4:3 aspect ratio, 7-row keyboard, Full-HD-screens-by-default-Thinkpads once again. I have a dream! :D

axur-delmeria
Senior ThinkPadder
Senior ThinkPadder
Posts: 2316
Joined: Mon May 28, 2012 5:49 am
Location: Metro Manila, Philippines

Re: Problem with one of the batteries of the T450s

#2 Post by axur-delmeria » Wed Sep 11, 2019 11:18 pm

One of the things you shouldn't do is keep a laptop on a shelf for months as a time.

The lithium-ion batteries inside self-discharge, and when the voltage gets too low, the BMS (battery management system) red-flags the entire battery pack as a safety precaution .
Daily driver: X220 4291-C91 i7-2620M

Backup: X601 Core 2 Duo T8100
Toy: X60F Core Solo U1300
On loan: X220 4291-P79 i5-2520M
In pieces: two retired but working X61Ts
RIP: 760XD 9546-U9E; X61 7676-A24; and a BOE-Hydis HV121P01-100 in failed SXGA+ mod
:cry:

LawStudentWithThinkpad
Posts: 3
Joined: Wed Sep 11, 2019 10:47 pm
Location: Metro Manila, Philippines

Re: Problem with one of the batteries of the T450s

#3 Post by LawStudentWithThinkpad » Wed Sep 11, 2019 11:26 pm

axur-delmeria wrote:
Wed Sep 11, 2019 11:18 pm
One of the things you shouldn't do is keep a laptop on a shelf for months as a time.

The lithium-ion batteries inside self-discharge, and when the voltage gets too low, the BMS (battery management system) red-flags the entire battery pack as a safety precaution .
I see, how do I un-red-flag it? What are my options now? Get a new internal (or is it external, how do I figure out which one was labeled non-OEM/non genuine?) battery? Switch to a Linux distro?
I have a dream, that IBM will regain the rights to manufacture and sell Thinkpads. I have a dream, that we will get 4:3 aspect ratio, 7-row keyboard, Full-HD-screens-by-default-Thinkpads once again. I have a dream! :D

axur-delmeria
Senior ThinkPadder
Senior ThinkPadder
Posts: 2316
Joined: Mon May 28, 2012 5:49 am
Location: Metro Manila, Philippines

Re: Problem with one of the batteries of the T450s

#4 Post by axur-delmeria » Thu Sep 12, 2019 12:35 am

No practical way to un-redflag it; IIRC a safety fuse inside the battery pack gets tripped when the voltage drops to 0v, which means you have to crack open the plastic shell, then have enough electronics skills to find said fuse and remove it. Oh, and there's also the matter of finding and purchasing said component in the first place. :x

In other words: it's much easier to just replace the battery pack.
Daily driver: X220 4291-C91 i7-2620M

Backup: X601 Core 2 Duo T8100
Toy: X60F Core Solo U1300
On loan: X220 4291-P79 i5-2520M
In pieces: two retired but working X61Ts
RIP: 760XD 9546-U9E; X61 7676-A24; and a BOE-Hydis HV121P01-100 in failed SXGA+ mod
:cry:

LawStudentWithThinkpad
Posts: 3
Joined: Wed Sep 11, 2019 10:47 pm
Location: Metro Manila, Philippines

Re: Problem with one of the batteries of the T450s

#5 Post by LawStudentWithThinkpad » Thu Sep 12, 2019 12:39 am

axur-delmeria wrote:
Thu Sep 12, 2019 12:35 am
No practical way to un-redflag it; IIRC a safety fuse inside the battery pack gets tripped when the voltage drops to 0v, which means you have to crack open the plastic shell, then have enough electronics skills to find said fuse and remove it. Oh, and there's also the matter of finding and purchasing said component in the first place. :x

In other words: it's much easier to just replace the battery pack.
I see. What's the FRU for the internal battery? I was planning on getting a 72whr external battery, so might as well replace both. Is replacing the internal battery an easy thing? Just remove defective battery, then pop in the new one?
I have a dream, that IBM will regain the rights to manufacture and sell Thinkpads. I have a dream, that we will get 4:3 aspect ratio, 7-row keyboard, Full-HD-screens-by-default-Thinkpads once again. I have a dream! :D

axur-delmeria
Senior ThinkPadder
Senior ThinkPadder
Posts: 2316
Joined: Mon May 28, 2012 5:49 am
Location: Metro Manila, Philippines

Re: Problem with one of the batteries of the T450s

#6 Post by axur-delmeria » Thu Sep 12, 2019 12:59 am

For disassembly instructions, it's best to grab a copy of the T450s Hardware Maintenance Manual (HMM): https://download.lenovo.com/pccbbs/mobi ... g54937.pdf

You can also look for disassembly videos to supplement the instructions found in the HMM.

There's also an FRU listing available online: https://download.lenovo.com/parts/Think ... 160115.pdf
Daily driver: X220 4291-C91 i7-2620M

Backup: X601 Core 2 Duo T8100
Toy: X60F Core Solo U1300
On loan: X220 4291-P79 i5-2520M
In pieces: two retired but working X61Ts
RIP: 760XD 9546-U9E; X61 7676-A24; and a BOE-Hydis HV121P01-100 in failed SXGA+ mod
:cry:

Post Reply
  • Similar Topics
    Replies
    Views
    Last post

Return to “ThinkPad T430/T530 and later Series”

Who is online

Users browsing this forum: No registered users and 7 guests