Bulging Li-Ion power packs

T

Tim Watts

Guest
In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...
 
Den mandag den 10. august 2015 kl. 23.01.29 UTC+2 skrev Tim Wescott:
On Mon, 10 Aug 2015 19:43:06 +0100, Tim Watts wrote:

In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad
happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...

It's a well-known issue amongst electric model airplane pilots. We tend
to demand more from our batteries, and we tend to use "naked" packs
without any protection electronics.

So if you search around with "RC" in your search terms you'll find all
sorts of tales of woe. RC pilots are taught to treat their LiPo packs
like they'll burst into flame at any moment, especially while charging.

This video gives a good overview of the LiPo wisdom among RC guys:
http://flitetest.com/articles/lipo-battery-bunker.

With RC planes, the biggest culprit that causes puffing is overcharging,
or charging them up to the limit and then letting them sit around fully
charged for months. Puffed cells will work OK, but sometimes at reduced
capacity.

As an incendiary device, a LiPo cell really sucks as far as dependability
goes -- you can't reliably set them off without a hatchet, hammer & nail
or other bit of sharp steel that'll violate the integrity of the outer
envelope. But once started, they shoot hot flames for a good while, and
would certainly catch stuff on fire.

For all that, one of my RC club members burnt his workshop down charging
LiPo batteries. Another one burnt a hole through the scrap piece of
carpet he was using trying to ferry a burning battery out to the back
yard from his basement. Incidents of batteries catching fire at the
field are rare, but have happened, particularly as a result of crashes or
charging.

Much of the issues that RC guys face can be mitigated by charging the
batteries conservatively and by matching the charging algorithm to the
specific cell chemistry -- both of these are impractical for RC use. I
suspect that your Apple batteries are just victims of old age, and
possibly Apple landing a bit too far on the "fully charged vs. safe"
spectrum when they designed their charging algorithm.

The recognized safe way to dispose of LiPo batteries is to chuck them in
a bucket of saturated salt water for 24 hours -- the salt water
discharges the battery at the same time that it provides a fire-proof
blanket. After the battery is dead-dead then you can just chuck it in
the trash.

The redneck way to safely dispose of LiPo batteries is to charge them
fully, then tape them to a post and shoot at them with a varmint rifle.
Good marksmanship is rewarded with flame. If you live someplace that
dries out in summer this is best done during the rainy months, or after
dousing the area around the post with water.
Click to expand...

putting any kind of batteries in the trash is a big no-no here, you just leave them net to the trash and they take them to recycling

-Lasse
 
On Mon, 10 Aug 2015 19:43:06 +0100, Tim Watts wrote:

In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad
happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...
Click to expand...

It's a well-known issue amongst electric model airplane pilots. We tend
to demand more from our batteries, and we tend to use "naked" packs
without any protection electronics.

So if you search around with "RC" in your search terms you'll find all
sorts of tales of woe. RC pilots are taught to treat their LiPo packs
like they'll burst into flame at any moment, especially while charging.

This video gives a good overview of the LiPo wisdom among RC guys:
http://flitetest.com/articles/lipo-battery-bunker.

With RC planes, the biggest culprit that causes puffing is overcharging,
or charging them up to the limit and then letting them sit around fully
charged for months. Puffed cells will work OK, but sometimes at reduced
capacity.

As an incendiary device, a LiPo cell really sucks as far as dependability
goes -- you can't reliably set them off without a hatchet, hammer & nail
or other bit of sharp steel that'll violate the integrity of the outer
envelope. But once started, they shoot hot flames for a good while, and
would certainly catch stuff on fire.

For all that, one of my RC club members burnt his workshop down charging
LiPo batteries. Another one burnt a hole through the scrap piece of
carpet he was using trying to ferry a burning battery out to the back
yard from his basement. Incidents of batteries catching fire at the
field are rare, but have happened, particularly as a result of crashes or
charging.

Much of the issues that RC guys face can be mitigated by charging the
batteries conservatively and by matching the charging algorithm to the
specific cell chemistry -- both of these are impractical for RC use. I
suspect that your Apple batteries are just victims of old age, and
possibly Apple landing a bit too far on the "fully charged vs. safe"
spectrum when they designed their charging algorithm.

The recognized safe way to dispose of LiPo batteries is to chuck them in
a bucket of saturated salt water for 24 hours -- the salt water
discharges the battery at the same time that it provides a fire-proof
blanket. After the battery is dead-dead then you can just chuck it in
the trash.

The redneck way to safely dispose of LiPo batteries is to charge them
fully, then tape them to a post and shoot at them with a varmint rifle.
Good marksmanship is rewarded with flame. If you live someplace that
dries out in summer this is best done during the rainy months, or after
dousing the area around the post with water.

--

Tim Wescott
Wescott Design Services
http://www.wescottdesign.com
 
On Mon, 10 Aug 2015 19:43:06 +0100, Tim Watts <tw_usenet@dionic.net>
wrote:

In the course of my work, today I was handed a defunct Apple Mac laptop.
The person commented "BTW the battery is bulging a bit"
Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.
Click to expand...

Yep. That's common and "normal":
<https://www.google.com/search?q=bulging+battery+macbook&tbm=isch>

When a battery reaches some temperature, then a chemical in the Cobalt
Oxide starts an exothermic (creates heat) reaction. More heat raises
the cell temperature which causes more of the same chemical reaction,
which liberates some gasses, and produces the battery of the bulge.
Eventually, all this will end in either the battery pack catching fire
or the reaction fizzles out leaving the battery in a swollen state.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).
Click to expand...

One of my customers tossed such a battery into their office dumpster.
About 12 hrs later, it caught fire. They put it out with a garden
hose.

So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.
Click to expand...

Not much. In order for the cell to get hot enough to ignite the
lithium, it would need to be charging or possibly fully charged. There
would also need to be something conductive to short the battery layers
internally. In the various battery fire videos found on YouTube, that
function is usually provided by pounding a nail through the battery
pack or cell. Also, some LiIon chemistries ignite at a lower
temperature than others (lithium cobalt oxide). See the Boeing
Dreamliner battery fires for an example.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.
Click to expand...

Maybe. 8 years ago was around the time of the 2006 and 2008 Sony
battery recalls. Sony was shipping cells with metal shavings floating
around inside. These perform the same function as pounding a nail
through the battery and did cause a few unplanned meltdowns. However,
8 years is beyond what I would consider typical LiIon battery life,
especially if it always left in the charger and running warm.
<http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries>

I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...
Click to expand...

About 15 years ago, I was busted by the county for maintaining an
unauthorized toxic waste dump of dead UPS batteries. Fortunately, I
talked my way out of it. Yeah, I know the feeling.

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.
Click to expand...

To avoid an Apple bashing flame war, which always produces more heat
than illumination, I'll refrain from disgorging my opinions on Apple
design, construction, pricing, and service.


--
Jeff Liebermann jeffl@cruzio.com
150 Felker St #D http://www.LearnByDestroying.com
Santa Cruz CA 95060 http://802.11junk.com
Skype: JeffLiebermann AE6KS 831-336-2558
 
On Mon, 10 Aug 2015 19:43:06 +0100, Tim Watts <tw_usenet@dionic.net>
wrote:

In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...
Click to expand...

My Razr cell phone battery started to bulge. The cover didnt fit
properly. Never caught fire. I think it was 3 years old at the time.
Never a problem like that with the replacements, so it wasn't charging
circuit related.

Cheer
 
On 10/08/15 22:27, Jeff Liebermann wrote:
On Mon, 10 Aug 2015 19:43:06 +0100, Tim Watts <tw_usenet@dionic.net
wrote:

In the course of my work, today I was handed a defunct Apple Mac laptop.
The person commented "BTW the battery is bulging a bit"
Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

Yep. That's common and "normal":
https://www.google.com/search?q=bulging+battery+macbook&tbm=isch

When a battery reaches some temperature, then a chemical in the Cobalt
Oxide starts an exothermic (creates heat) reaction. More heat raises
the cell temperature which causes more of the same chemical reaction,
which liberates some gasses, and produces the battery of the bulge.
Eventually, all this will end in either the battery pack catching fire
or the reaction fizzles out leaving the battery in a swollen state.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

One of my customers tossed such a battery into their office dumpster.
About 12 hrs later, it caught fire. They put it out with a garden
hose.
Click to expand...

Well I'm glad I bothered now :)

So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

Not much. In order for the cell to get hot enough to ignite the
lithium, it would need to be charging or possibly fully charged. There
would also need to be something conductive to short the battery layers
internally. In the various battery fire videos found on YouTube, that
function is usually provided by pounding a nail through the battery
pack or cell. Also, some LiIon chemistries ignite at a lower
temperature than others (lithium cobalt oxide). See the Boeing
Dreamliner battery fires for an example.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.

Maybe. 8 years ago was around the time of the 2006 and 2008 Sony
battery recalls. Sony was shipping cells with metal shavings floating
around inside. These perform the same function as pounding a nail
through the battery and did cause a few unplanned meltdowns. However,
8 years is beyond what I would consider typical LiIon battery life,
especially if it always left in the charger and running warm.
http://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries
Click to expand...

This is all very interesting - thank you :)

I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

About 15 years ago, I was busted by the county for maintaining an
unauthorized toxic waste dump of dead UPS batteries. Fortunately, I
talked my way out of it. Yeah, I know the feeling.

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

To avoid an Apple bashing flame war, which always produces more heat
than illumination, I'll refrain from disgorging my opinions on Apple
design, construction, pricing, and service.
Click to expand...

:->
 
In article <qu7n9c-n4i.ln1@squidward.sv.dionic.net>,
Tim Watts <tw_usenet@dionic.net> wrote:

In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...
Click to expand...

Old batteries start to have problems with excessive internal resistance
and metal whiskers. The first symptom is bloating. The second symptom
is that it bursts into flames.

Dead LiIon packs are still dangerous. LiIon cells are likely to explode
if overcharged or over-discharged then recharged. As a result, all
battery packs contain a circuit board that goes open-circuit when the
battery voltage is outside a safe range. There's just enough power left
in a "dead" pack to ignite the flammable electrolyte and gasses.

There are plenty of YouTube videos of people whacking "dead" battery
packs with a rake and then having them shoot flames.

--
I will not see posts from astraweb, theremailer, dizum, or google
because they host Usenet flooders.
 
On 12/08/15 06:38, Kevin McMurtrie wrote:
In article <qu7n9c-n4i.ln1@squidward.sv.dionic.net>,
Tim Watts <tw_usenet@dionic.net> wrote:

In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...

Old batteries start to have problems with excessive internal resistance
and metal whiskers. The first symptom is bloating. The second symptom
is that it bursts into flames.

Dead LiIon packs are still dangerous. LiIon cells are likely to explode
if overcharged or over-discharged then recharged. As a result, all
battery packs contain a circuit board that goes open-circuit when the
battery voltage is outside a safe range. There's just enough power left
in a "dead" pack to ignite the flammable electrolyte and gasses.

There are plenty of YouTube videos of people whacking "dead" battery
packs with a rake and then having them shoot flames.
Click to expand...

I feel vindicated!
 
On Monday, August 10, 2015 at 2:43:14 PM UTC-4, Tim Watts wrote:
In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...
Click to expand...

Old thread is still relevant! My 15-inch 2012 MacBook Pro has developed the
bulge, too. (Apple's free battery replacement program only covers 13-
inchers. Apple told me it's not covered; go to authorized service center.)
I'd like to replace the cells. The replacement kit sells for about $50-90 USD.

o Has anyone done the replacement?
The job per iFixit is quite involved, nearly a full tear down.
But YouTubers have posted shorter methods, removing fewer parts, and using
fishing line to cut thru the glue (underneath the cells).
o Once replaced, what's to stop the new cells from swelling?
This PC runs hot, and heat shortens battery life. Would slowing the CPU clock
help? Has anyone modified the charge controller circuit or its programming,
to prolong battery life*, e.g., lowering the charge current, lowering the cut-
off voltage to 4.10 or 4.05 instead of 4.20V?

I don't care if the time between charges is shorter. I keep it plugged in
99.99% of the time.

* see https://batteryuniversity.com/learn/article/how_to_prolong_lithium_based_batteries

Thanks for any helpful advice! - Rich S.
 
On 13/4/20 8:10 am, Rich S wrote:
On Monday, August 10, 2015 at 2:43:14 PM UTC-4, Tim Watts wrote:
In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad happening...


So - what has likely happened to cause the cells to bloat? In the one
where the case fell apart, one cell felt very gassy.

These batteries are around 8 years old plus/minus a year.

In reality - are they likely to be a risk? I assume, with LiIon the risk
would only exist if the cells were charged rather than flat - no
metallic lithium unlike lithium primary cells.



I must admit I have never seen an LiIon pack do this - but then I tend
to throw my old crap out before it gets that old... In England, (and the
EU) we have to follow the correct disposal/recycling process which means
stuff often gets hoarded until someone like me comes along and books a
big disposal...

I am also not sure why it all seemed to be Apple stuff - they are not
known for being "cheap". So I'm thinking it must be a little more
generic in cause.

Cheers for any thoughts...


Old thread is still relevant! My 15-inch 2012 MacBook Pro has developed the
bulge, too. (Apple's free battery replacement program only covers 13-
inchers. Apple told me it's not covered; go to authorized service center.)
I'd like to replace the cells. The replacement kit sells for about $50-90 USD.

o Has anyone done the replacement?
The job per iFixit is quite involved, nearly a full tear down.
Click to expand...

Small computer repair shops do these all the time, so they don't need to
refer to detailed instructions as they work - it's a very quick job for
them, and so it doesn't cost much. Some might over-charge, so get some
quotes, but seriously - get it done by one of these and save yourself
the hassle.

That's what I did anyhow. They said it would take 45 minutes but was
done in only 25, while I wandered the shops nearby.

Clifford Heath.
 
Rich S wrote:

On Monday, August 10, 2015 at 2:43:14 PM UTC-4, Tim Watts wrote:
In the course of my work, today I was handed a defunct Apple Mac laptop.

The person commented "BTW the battery is bulging a bit"

Within 2 hours I had 3 Mac LiIOn batteries with bulges. One so extreme
that the casing fell apart in my hands.

After a chat with the university fire officer, these are now in "secure
containment" outside the building (a metal bin away from anything
flammable).

I realise the risk of spontaneous combustion is very slim, but if it did
happen in an office context it would make up for that by the badness of
what would happen. This was exactly our fire officers thinking - no need
to panic, but let's just mitigate against anything really bad
happening...
Click to expand...

An offie context is one thing. IIRC, there was an airplane that had
batteries which developed bulging batteries. The 787.

--
Paul Hovnanian mailto:paul@Hovnanian.com
------------------------------------------------------------------
Yes, I'm into fitness. I'm fitness whole taco right into my mouth.
 
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