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Problem with one of the batteries of the T450s
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- Posts: 3
- Joined: Wed Sep 11, 2019 10:47 pm
- Location: Metro Manila, Philippines
Problem with one of the batteries of the T450s
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.
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!
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- Senior ThinkPadder
- Posts: 3832
- Joined: Mon May 28, 2012 5:49 am
- Location: Metro Manila, Philippines
Re: Problem with one of the batteries of the T450s
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 .
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 .
Planned Purchase: T480s i5-8350 FHD Touch
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
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- Posts: 3
- Joined: Wed Sep 11, 2019 10:47 pm
- Location: Metro Manila, Philippines
Re: Problem with one of the batteries of the T450s
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?axur-delmeria wrote: ↑Wed Sep 11, 2019 11:18 pmOne 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 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!
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- Senior ThinkPadder
- Posts: 3832
- Joined: Mon May 28, 2012 5:49 am
- Location: Metro Manila, Philippines
Re: Problem with one of the batteries of the T450s
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.
In other words: it's much easier to just replace the battery pack.
In other words: it's much easier to just replace the battery pack.
Planned Purchase: T480s i5-8350 FHD Touch
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
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- Posts: 3
- Joined: Wed Sep 11, 2019 10:47 pm
- Location: Metro Manila, Philippines
Re: Problem with one of the batteries of the T450s
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?axur-delmeria wrote: ↑Thu Sep 12, 2019 12:35 amNo 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.
In other words: it's much easier to just replace the battery pack.
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!
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- Senior ThinkPadder
- Posts: 3832
- Joined: Mon May 28, 2012 5:49 am
- Location: Metro Manila, Philippines
Re: Problem with one of the batteries of the T450s
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
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
Planned Purchase: T480s i5-8350 FHD Touch
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
Impulse Buy: Thinkpad not named for safety reasons
RIP: X220 4291-C91 X61 7676-A24 760XD-U9E
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