Thanks for the video, I just replaced all the cells in my old Levono nine-cell extended battery pack. It's much cheaper than a new battery pack and the higher capacity cell gives me increased run time.
This was a well made and detailed video, I'm planning on rebuilding a battery pack for my x230 with the highest capacity cells I can get, if that works out well I'm going to do the same with the slice battery.
Thanks, Charles. I am going to make an update to this video. While the battery is discharging fine and giving me over 2.5 hours, The charge time is incredibly slow. Like 2w recharge per hour, instead of 20+w per hour. I don't know if it was because the BMS lost power or because it senses that there are different cells in the pack.
@@diyroby732 have you done a couple of full charge-drain-charge cycles to fully calibrate it? It may be thinking the pack is more charged than it is and slowing down the charge rate
Yep, I have done many full discharges. I am so disappointed by this as I was ready blow big money on high capacity cells if all went well. Discharge is smooth though, no sudden power off of laptop. I am just being trolled by 15 hour recharge times. On the bright side, with such slow recharge, the pack will live 3 times longer than a regular battery lol
@@diyroby732 Run the Lenovo battery calibration tool, I bought a "new" battery last year and it was ok. I only got the full capacity after running the cal. program. It's part of Thinkvantage tools and seemed to take long time so i left it run overnight. Come morning and now I have full (109%) capacity. I'm reading it with BatteryInfoView (Nirsoft). Didn't have slow charging before so maybe not effective but worth a try I think
Thank you for this very informative video :) It inspires me to replace the cells in my Thinkpad X201 battery, which has maybe 2000 mWh left (3 minutes)...
That's true, just make a search about laptop BMS and you will see most of them aren't as easy as rebuild, i'm in that situation and i'd like to know how to replace the bms circuit for some other compatible aliexpress one...
Recelled my Lenovo battery. The battery is working. But the problem is the laptops still giving reading of old cells. Tried recalibrating 5 times but still giving old readings.
I'm wanting to do this myself soon. Have you done it yet? Any issues? Some of the very old ThinkPad batteries (from the IBM era) will self destruct the BMS once they are desoldered. I don't know when the design change happened, but you used to have to swap cells while the BMS was energized.
but isnt true that most bms become useless after being disconnected from its original batteries due to some chip protection ??? (i've also tried to replace the cells with no success)
Loved the video, am considering looking into doing a similar procedure with my W530's battery. How's the state of the battery pack after a little less than a year?
Thanks, Henry, Current capacity is 36Wh but I may need to recalibrate it by draining the battery completely. It 10-15W consumption every hour, I can get 2 - 2.5 hours use. The recharge time is incredibly slow. Like 2w recharge per hour, instead of 20+w per hour. I don't know if it was because the BMS lost power or because it senses that there are different cells in the pack. It's like I'm being trolled.
Excellent video. Dear friend, I have a situation, battery backup stay only 3-5 minutes: my Lenovo laptop 6 cell battery, I opened it and checked one by one voltage, 4 of them are 4 volts and 2 are 3.98 volts, which more or less same. Then what could be the problem? Why doesn't stay longer? Do you suggest to change all the batteries? Please advise
The voltage may be normal, but the capacity is almost close to nothing for one or more batteries. You have to do a discharge test to find the battery that is dead, or replace all at once to be safe. Check for battery discharge test 18650 on google or youtube.
My Thinkpad x230 battery needs a minute a two from 100 percent until the laptop shuts down. After turning it on again the battery shows me 12 percent and usually takes me one or two hours to work with the laptop until it shuts down again. In the Lenovo vantage battery section, I see that the battery has a really small capacity only 1.7Wh but the voltage is 11.6 volts. How can I explain that and is there a way to fix it? Thanks.
my x230 tablet does this too. I've replaced my battery and never actually use the laptop of the charger just using the battery then the first time i went to use it on battery it died within 2 minutes. very frustration. I also never use the laptop in suspend mode.
Yes, most batteries will lock up completely if they detect the cels being disconnected. I made a video on this here ruclips.net/video/I7Llii69YYM/видео.html
I put in new bats. After fully charging them. If I try to power up with the new pack. The machine shows me the boot screen and reboots. If I power up on a/c mains. And then try to slide in the bat. The machine reboots.
Hi. Is there a way to reset the battery health? Mine is stuck at 6% (value before I replaced the cells), when I disable the battery from control panel it seems to work for 1hr+
Hey, you could try disabling the battery from your device manager and then let the laptop run to the ground. If your laptop can't completely drain the battery, then allow it to run till you get to the lowest percentage, then restart teh laptop, go into the bios and let the computer run till it shuts off. Then recharge the laptop to full and see what happens. Let me know how it goes. Here is my video on this ruclips.net/video/iYMnDykddyo/видео.html
@@diyroby732 my battery was at 6% before I replaced the cells, I had to restart it using the 12v bridge you mentioned, now I after replacing it with some used cells (just a test project) it still shows me 10 min as the battery health is only showing 3%(1710hWh). Had tested the cells, and each pair had about 2750mah.. Now when I disable the battery from device manager I can work for about 1.5hrs.. I had recharged it with windows up and running,, will try once more with the laptop switched off too and will update you
If it's a ThinkPad/Lenovo you've done this project on, their tool available in the Windows store called Lenovo Vantage has an option to reset the batteries. Not sure if this helps anyone but figured it'd be worth mentioning.
Can You Tell Me I Have Dell Inspiron 15-3521 Model Battery, But I Checked All Cells Are Damaged. My Battery Is 4Cell LGDBC21865 Which Is 40WH 2800mah. But Same Cells Are Not Available Online Or Offline Market. Can I Replace Cells With 18650 Model 2600mah Or 3000mah 4Cells?
and how did you resolder without making bridge , bms on lenovo batteries will lock after disconnecting it and you cannot use it anymore , this is probably fake video
Thanks for the video, I just replaced all the cells in my old Levono nine-cell extended battery pack. It's much cheaper than a new battery pack and the higher capacity cell gives me increased run time.
Cheers,
Can you explain how??? Any hick-ups to take care of?
This was a well made and detailed video, I'm planning on rebuilding a battery pack for my x230 with the highest capacity cells I can get, if that works out well I'm going to do the same with the slice battery.
Thanks, Charles. I am going to make an update to this video. While the battery is discharging fine and giving me over 2.5 hours, The charge time is incredibly slow. Like 2w recharge per hour, instead of 20+w per hour. I don't know if it was because the BMS lost power or because it senses that there are different cells in the pack.
@@diyroby732 have you done a couple of full charge-drain-charge cycles to fully calibrate it? It may be thinking the pack is more charged than it is and slowing down the charge rate
Yep, I have done many full discharges. I am so disappointed by this as I was ready blow big money on high capacity cells if all went well. Discharge is smooth though, no sudden power off of laptop. I am just being trolled by 15 hour recharge times. On the bright side, with such slow recharge, the pack will live 3 times longer than a regular battery lol
@@diyroby732 Run the Lenovo battery calibration tool, I bought a "new" battery last year and it was ok. I only got the full capacity after running the cal. program. It's part of Thinkvantage tools and seemed to take long time so i left it run overnight. Come morning and now I have full (109%) capacity. I'm reading it with BatteryInfoView (Nirsoft). Didn't have slow charging before so maybe not effective but worth a try I think
@@MarkoNurmenniemi doesn't that tool only work on windows 7 ?
Thank you for this very informative video :) It inspires me to replace the cells in my Thinkpad X201 battery, which has maybe 2000 mWh left (3 minutes)...
did you ever end up changing the cell out?
@@cousinace3798 No, I didn't have the tools and just bought a new battery. Now, the laptop can work for 3 hours straight again.
dissconnect the power to the bms on newer battery may cause them to self distruct so replace cell without cutting the power if possible
That's true, just make a search about laptop BMS and you will see most of them aren't as easy as rebuild, i'm in that situation and i'd like to know how to replace the bms circuit for some other compatible aliexpress one...
Awesome work man !
No need to salvage scruffy old connectors. Brand new metal zip ties will work for the connectors. Just cut the zip ties up to the right sizes.
TOP!!!!!!!!!
Just what i was looking for!!
Nice tutorial! Thanks!👍👋
Recelled my Lenovo battery. The battery is working.
But the problem is the laptops still giving reading of old cells. Tried recalibrating 5 times but still giving old readings.
good job this is the way i like to repair repurpose and reuse...
Good stuff and well done!
Excellent work
Can this be done with T440p batteries? Particularly interested in recelling a generic third-party 9-cell.
I'm wanting to do this myself soon. Have you done it yet? Any issues? Some of the very old ThinkPad batteries (from the IBM era) will self destruct the BMS once they are desoldered. I don't know when the design change happened, but you used to have to swap cells while the BMS was energized.
Very detailed video.. Please share the Arduino circuit diagram and code to check cells.
but isnt true that most bms become useless after being disconnected from its original batteries due to some chip protection ??? (i've also tried to replace the cells with no success)
Will this work just as well with cheap aftermarket batteries, or will I need to find a genuine Lenovo pack to rebuild?
Loved the video, am considering looking into doing a similar procedure with my W530's battery. How's the state of the battery pack after a little less than a year?
Thanks, Henry, Current capacity is 36Wh but I may need to recalibrate it by draining the battery completely. It 10-15W consumption every hour, I can get 2 - 2.5 hours use. The recharge time is incredibly slow. Like 2w recharge per hour, instead of 20+w per hour. I don't know if it was because the BMS lost power or because it senses that there are different cells in the pack. It's like I'm being trolled.
Excellent video. Dear friend, I have a situation, battery backup stay only 3-5 minutes: my Lenovo laptop 6 cell battery, I opened it and checked one by one voltage, 4 of them are 4 volts and 2 are 3.98 volts, which more or less same. Then what could be the problem? Why doesn't stay longer? Do you suggest to change all the batteries? Please advise
The voltage may be normal, but the capacity is almost close to nothing for one or more batteries. You have to do a discharge test to find the battery that is dead, or replace all at once to be safe. Check for battery discharge test 18650 on google or youtube.
You should link to your old videos you mentioned, like the one about open a battery.
My Thinkpad x230 battery needs a minute a two from 100 percent until the laptop shuts down. After turning it on again the battery shows me 12 percent and usually takes me one or two hours to work with the laptop until it shuts down again. In the Lenovo vantage battery section, I see that the battery has a really small capacity only 1.7Wh but the voltage is 11.6 volts. How can I explain that and is there a way to fix it? Thanks.
my x230 tablet does this too. I've replaced my battery and never actually use the laptop of the charger just using the battery then the first time i went to use it on battery it died within 2 minutes. very frustration. I also never use the laptop in suspend mode.
Unfortunately x220t new genuines are no longer available so I may attempt myself.
I was advised to keep the BMS powered at all times by hooking up a 250mah Li-Po battery until replacement of the cells has concluded. Is this true?
Yes, most batteries will lock up completely if they detect the cels being disconnected. I made a video on this here ruclips.net/video/I7Llii69YYM/видео.html
I put in new bats. After fully charging them.
If I try to power up with the new pack. The machine shows me the boot screen and reboots.
If I power up on a/c mains. And then try to slide in the bat. The machine reboots.
Is it possible to use different amperage batteries than in original Lenovo pack?
i replaced my old cells with new one, but there is no voltage on output, bms restarting does not help, does it mean controler board is faulty?
It might mean the producers have a way to brick the battery to prevent recelling. What brand is this?
I was replacing cells of my Lenovo X220 but I blew the fuse :( can I replace it with thin wire? hope it wont cause any issue
how voltage needs to have the 18650 lithium cell?
friends, l had lenovo l3000 g530.
i opened the battery. and there were only 4 18650 batteries...
is it possible?
are you still using the battery until now? how many hours it will last?
Yes, still using it. capacitz has gone down from aroung 3 hours to 2-2.5 hours
great😀.thanks for the update..i like your video tutorial, hope i can sucessfully do it on my laptop battery pack..😀
Hi,, any tips.. I'm trying to rebuild battery for r61 but bms is blown. Bridge it but keeps on going dead but cells are good
Unfortunately, no idea. There may be other protection preventing your battery from being restarted permanently.
@@diyroby732 friends, l had lenovo l3000 g530.
i opened the battery. and there were only 4 18650 batteries...
is it possible?
Hi.
Is there a way to reset the battery health? Mine is stuck at 6% (value before I replaced the cells), when I disable the battery from control panel it seems to work for 1hr+
Hey, you could try disabling the battery from your device manager and then let the laptop run to the ground. If your laptop can't completely drain the battery, then allow it to run till you get to the lowest percentage, then restart teh laptop, go into the bios and let the computer run till it shuts off. Then recharge the laptop to full and see what happens. Let me know how it goes. Here is my video on this ruclips.net/video/iYMnDykddyo/видео.html
@@diyroby732 my battery was at 6% before I replaced the cells, I had to restart it using the 12v bridge you mentioned, now I after replacing it with some used cells (just a test project) it still shows me 10 min as the battery health is only showing 3%(1710hWh). Had tested the cells, and each pair had about 2750mah.. Now when I disable the battery from device manager I can work for about 1.5hrs.. I had recharged it with windows up and running,, will try once more with the laptop switched off too and will update you
If it's a ThinkPad/Lenovo you've done this project on, their tool available in the Windows store called Lenovo Vantage has an option to reset the batteries. Not sure if this helps anyone but figured it'd be worth mentioning.
Can You Tell Me I Have Dell Inspiron 15-3521 Model Battery, But I Checked All Cells Are Damaged. My Battery Is 4Cell LGDBC21865 Which Is 40WH 2800mah. But Same Cells Are Not Available Online Or Offline Market. Can I Replace Cells With 18650 Model 2600mah Or 3000mah 4Cells?
Check online for your exact battery model + rebuild/recell/change cells etc. MY success was with a lenovo battery, no idea about dells.
@@diyroby732 friends, l had lenovo l3000 g530.
i opened the battery. and there were only 4 18650 batteries...
is it possible?
bro, it a battery says +14.4 == 37 Wh does it mean that each one of the 4 cells are 3.6V ?
That's LiPo default 3,7V per cell - so battery total is always a multiple of this
So you didn't just fixed the pack, you increased the energy density. I think that it might affect the safety of the battery.
It worked well for a couple of years before I replaced the laptop.
why would it effect safety? Battery capacity doesn't matter, the charge is determined by voltage, once they're full they're full and stop charging
and how did you resolder without making bridge , bms on lenovo batteries will lock after disconnecting it and you cannot use it anymore , this is probably fake video
Yep. Video is fake. Goodbye - ruclips.net/video/I7Llii69YYM/видео.html
Sick tan bro