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Started By
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freezing batteries- why does it work?
Posted on 11/25/19 at 5:31 pm
Posted on 11/25/19 at 5:31 pm
I came across this recently while trying to revive a Ryobi li-ion battery that wouldn't charge.
I ended up doing the pulse method instead, and that worked- I was able to bring the charge back up enough that the charger would kick in and recharge it. It since works as expected.
But back onto the freezing method- I have an older laptop, the battery was saying "not charging" when plugged in, and the laptop would immediately go dead when I unplugged the charger.
I looked and didn't see how to easily disassemble it to get to the cells, so I put it in a ziplock and stuck it in the freezer over the weekend. I took it out last night, and plugged it into the laptop and charger today. It took a full charge, and seems to be holding decently after coming off the charger; still at 88% a couple hrs unplugged.
This is an old Dell i7 from around 2010.
I read up some on this, but admit I haven't used my chemistry in probably 3 decades. So, can anyone tell me the shorter version on how that works?
I ended up doing the pulse method instead, and that worked- I was able to bring the charge back up enough that the charger would kick in and recharge it. It since works as expected.
But back onto the freezing method- I have an older laptop, the battery was saying "not charging" when plugged in, and the laptop would immediately go dead when I unplugged the charger.
I looked and didn't see how to easily disassemble it to get to the cells, so I put it in a ziplock and stuck it in the freezer over the weekend. I took it out last night, and plugged it into the laptop and charger today. It took a full charge, and seems to be holding decently after coming off the charger; still at 88% a couple hrs unplugged.
This is an old Dell i7 from around 2010.
I read up some on this, but admit I haven't used my chemistry in probably 3 decades. So, can anyone tell me the shorter version on how that works?
3
Posted on 11/25/19 at 7:00 pm to Scoob
Cooler temperatures slow down a battery's chemical reactions.
Posted on 11/25/19 at 8:21 pm to Ace Midnight
quote:I gathered that; but I was a little confused about what happened.
Cooler temperatures slow down a battery's chemical reactions.
I had it unplugged awhile, and it was stone dead. I plugged it in and it would power up, but the battery was saying something like 0%, and not charging (per windows). I left it plugged in awhile (days), and still no charging going on.
I figured it depleted below the threshold to where it would take a charge (learned about this while fiddling with the Ryobi). With the Ryobi, I took the battery apart and used a cannabalized old phone charger (tapping the wires to the Pos and Neg terminals on the cell pack). That jumped the Ryobi back, to where it would charge, and that battery pack now seems fine.
I was going to do the same thing with the laptop pack, but didn't see an easy way to take it apart, so explored some more. Freezing was recommended, and it worked. But I'm a little befuddled why it would change the battery's ability to take a charge, when it wasn't able to before.
Posted on 11/25/19 at 8:54 pm to Scoob
From what I gather, it has less to do with chemistry and more to do with physics.
I think when li-ion batteries degrade, it's because the electrolyte or whatever "gunks up" and stops allowing current to flow as well. Freezing it might cause it to harden and crack, so it breaks up the gunk and allows current to flow again.
I think when li-ion batteries degrade, it's because the electrolyte or whatever "gunks up" and stops allowing current to flow as well. Freezing it might cause it to harden and crack, so it breaks up the gunk and allows current to flow again.
Posted on 11/25/19 at 10:20 pm to Scoob
I just threw an old dead laptop battery in the freezer. I'll be amazed if this actually works.
Posted on 11/25/19 at 11:53 pm to Scoob
Our 1 year old likes to grab the remotes and walk away with them. One night our tv remote was slobbered on and not working. I decided to put it in the freezer for 20 minutes and the sob worked like a charm. I have no reason or explanation but there it is.
Posted on 11/25/19 at 11:59 pm to TAMU-93
quote:Make sure you let it warm up again before trying to charge it.
I just threw an old dead laptop battery in the freezer. I'll be amazed if this actually works.
Also if it doesn't help much or at all, freeze it again. I've read that sometimes it takes a few rounds.
This post was edited on 11/26/19 at 12:00 am
Posted on 11/26/19 at 11:24 am to Korkstand
ok, so far so good. I think this is going to be just fine.
Old laptop, but a nice one- a 14" Latitude E6420, 10 yrs old but still fine for everything outside of gaming. Has an i7 quadcore cpu, 8gb ram, 256gb ssd, and nvidia nvs 4200m gpu.
After getting the battery up and running, I took a tip from my brother and did the free upgrade from W7 to W10 (Pro); apparently that is still working, despite the offer having expired 3 yrs ago. It did the install fine, and I have an activated acct so it's legit. Currently pushing the latest nvidia driver install.
I fiddled around last night and left it off the charger, it was still alive this morning. I just put it back on charge.
Old laptop, but a nice one- a 14" Latitude E6420, 10 yrs old but still fine for everything outside of gaming. Has an i7 quadcore cpu, 8gb ram, 256gb ssd, and nvidia nvs 4200m gpu.
After getting the battery up and running, I took a tip from my brother and did the free upgrade from W7 to W10 (Pro); apparently that is still working, despite the offer having expired 3 yrs ago. It did the install fine, and I have an activated acct so it's legit. Currently pushing the latest nvidia driver install.
I fiddled around last night and left it off the charger, it was still alive this morning. I just put it back on charge.
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