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
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
Battery charging very slow then stops
-
- Posts: 6
- Joined: Sun Jun 28, 2015 1:51 am
- Location: Auckland, New Zealand
Battery charging very slow then stops
Hi Guys,
Ive had my t420 for about 3 years and the last time I used it from battery alone was a couple of weeks ago as we often have
power cuts etc and the battery always last great and did last time also......this morning when I tried to turn it on the battery was so dead it would not power up.
I had a spare battery that is crap to test it but it did power up for a few seconds
So I know the battery is ok in my first pack but something is telling my laptop they are not.......
I ran the Bat reset and did not help......
I have a box of 100+ laptop batterys I got second hand for a project they were meant to be faulty/old batterys. 90% of the 18650 cells inside have over 60% of the capacity still left......
is it the circuits that fail ? can I fix mine ? its a 9 cell 94Wh pack
Cheers
Brett
Ive had my t420 for about 3 years and the last time I used it from battery alone was a couple of weeks ago as we often have
power cuts etc and the battery always last great and did last time also......this morning when I tried to turn it on the battery was so dead it would not power up.
I had a spare battery that is crap to test it but it did power up for a few seconds
So I know the battery is ok in my first pack but something is telling my laptop they are not.......
I ran the Bat reset and did not help......
I have a box of 100+ laptop batterys I got second hand for a project they were meant to be faulty/old batterys. 90% of the 18650 cells inside have over 60% of the capacity still left......
is it the circuits that fail ? can I fix mine ? its a 9 cell 94Wh pack
Cheers
Brett
-
- Senior ThinkPadder
- Posts: 2670
- Joined: Sun Aug 09, 2015 9:25 am
- Location: N. Bellmore, ny
Re: Battery charging very slow then stops
Its not the cells, it is a faulty power circuit. You need a new battery, not new cells. Ive seen this happen with my X61 battery.
Thinkpad4by3's Law of the Universe.
The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.
The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.
-
- Posts: 6
- Joined: Sun Jun 28, 2015 1:51 am
- Location: Auckland, New Zealand
Re: Battery charging very slow then stops
Ok thanks.....anyone tried to fix the circuit ? im ok on a re-flow station etc
-
- Senior ThinkPadder
- Posts: 2670
- Joined: Sun Aug 09, 2015 9:25 am
- Location: N. Bellmore, ny
Re: Battery charging very slow then stops
If you can reverse engineer a proprietary chip and find a donor to swap while keeping constant current on the low-voltage detection circuit, be my guest. Or....you could just go on eBay and get a brand new OEM battery for a tad over 30$. Your choice though.
https://www.ebay.com/itm/Genuine-Origin ... Swr~lYrkVh
https://www.ebay.com/itm/Genuine-Origin ... Swr~lYrkVh
Thinkpad4by3's Law of the Universe.
The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.
The efficiency of two screens equally sized with equal numbers if pixels are equal. The time spent by a 4:3 user complaining about 16:9 is proportional to the inefficiency working with a 16:9 display, therefore the amount of useful work extracted is equal.
Re: Battery charging very slow then stops
Will the machine power on AC adapter only, with no battery inserted?buzzliteyear wrote: ↑Mon Oct 30, 2017 4:38 pmOk thanks.....anyone tried to fix the circuit ? im ok on a re-flow station etc
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)
Cheers,
George (your grouchy retired FlexView farmer)
One FlexView to rule them all: A31p
Abused daily: T520, X200s
PMs requesting personal tech support will be ignored.
Cheers,
George (your grouchy retired FlexView farmer)
One FlexView to rule them all: A31p
Abused daily: T520, X200s
PMs requesting personal tech support will be ignored.
-
- Posts: 6
- Joined: Sun Jun 28, 2015 1:51 am
- Location: Auckland, New Zealand
Re: Battery charging very slow then stops
yep cool....just have to find a seller that ships to New Zealand.......
-
- Posts: 6
- Joined: Sun Jun 28, 2015 1:51 am
- Location: Auckland, New Zealand
Re: Battery charging very slow then stops
Will the machine power on AC adapter only, with no battery inserted?
Yes works fine but is slower than normal.....I had tested running without the battery before when battery was fine and
it did the same thing.....a little lagy
Re: Battery charging very slow then stops
My best guess is that the problem is within the laptop's charging circuitry and not with the battery itself. However, the only way to verify that would be to verify how the machine behaves with a *known good* battery inserted.buzzliteyear wrote: ↑Mon Oct 30, 2017 7:59 pmYes works fine but is slower than normal.....I had tested running without the battery before when battery was fine and
it did the same thing.....a little lagy
...Knowledge is a deadly friend when no one sets the rules...(King Crimson)
Cheers,
George (your grouchy retired FlexView farmer)
One FlexView to rule them all: A31p
Abused daily: T520, X200s
PMs requesting personal tech support will be ignored.
Cheers,
George (your grouchy retired FlexView farmer)
One FlexView to rule them all: A31p
Abused daily: T520, X200s
PMs requesting personal tech support will be ignored.
-
- Posts: 6
- Joined: Sun Jun 28, 2015 1:51 am
- Location: Auckland, New Zealand
Re: Battery charging very slow then stops
Good point. I have recommended these laptops two close mates so will borrow one and test
-
- Similar Topics
- Replies
- Views
- Last post
-
-
detachable battery does not charge. White light, then amber, then off.
by redglow » Wed Nov 01, 2023 6:12 pm » in ThinkPad T430-T490 / T530-T590 Series - 2 Replies
- 9850 Views
-
Last post by redglow
Fri Nov 03, 2023 2:05 am
-
-
-
[RESOLVED: CPU had died!]: ThinkPad L540 froze then rebooted and now black screen
by glossywhite » Sun Dec 10, 2023 2:17 pm » in ThinkPad L430/L530 and later Series - 20 Replies
- 10094 Views
-
Last post by glossywhite
Wed Dec 20, 2023 7:02 pm
-
-
-
ThinkPad T530 Very little power, Will not power on
by ThinkPad560X » Sun Mar 10, 2024 12:42 am » in ThinkPad T430-T490 / T530-T590 Series - 2 Replies
- 360 Views
-
Last post by ThinkPad560X
Sun Mar 10, 2024 12:57 pm
-
-
-
T480: What kind of battery life can I expect with a WQHD display + 96Wh of battery?
by Maverick000 » Thu Oct 19, 2023 9:12 am » in ThinkPad T430-T490 / T530-T590 Series - 4 Replies
- 4504 Views
-
Last post by theterminator93
Tue Mar 05, 2024 10:27 pm
-
Who is online
Users browsing this forum: Bing [Bot] and 27 guests