5 ms·

> a 100WH battery a hand grenade typically releases 250kJ, or about 70Wh you're asking for the equivalent of 1.5 grenades in your lap :)

by ddalex 5y ago

chrismorgan 5y ago
Airlines tend to cap lithium-ion batteries at 100Wh, so it’s quite common for laptops and power banks to go to or just shy of that. https://www.apple.com/newsroom/2019/11/apple-introduces-16-inch-macbook-pro-the-worlds-best-pro-notebook/ https://www.apple.com/newsroom/2019/11/apple-introduces-16-i... speaks of a 100Wh battery. My latest laptop has about a 90Wh battery. Hopefully your laptop and hand grenade have radically different power discharge profiles.
- ddalex 5y ago
  > Hopefully your laptop and hand grenade have radically different power discharge profiles Li battery fires are not unheard of, unfortunately, so the profiles may start to resemble sometimes.
  - littlestymaar 5y ago
    Lithium batteries burn, quite quickly but it still takes a few seconds, that can be pretty dangerous indeed but that's several orders of magnitude slower than a grenade.
grenoire 5y ago
The hand grenade is arguably better at releasing that energy at an instant.
r9 5y ago
There's a subtle difference. One is designed to release that energy in a fraction of a second in a frangible metal casing, the other is designed to release it over a number of hours. Yes, batteries can go wrong, just like any tech, but comparing them to hand grenades is just ludicrous.
- d110af5ccf 5y ago
  > comparing them to hand grenades is just ludicrous Next, let's calculate the energy input required to heat a small cup of coffee and compare that to a hand grenade. (Hint: The coffee wins easily.) I wonder how many hand grenade equivalents a 10 minute lukewarm shower equates to?
  - ljm 5y ago
    In some universe there's an internal combustion shower powered entirely by an operator ripping out pull rings with their teeth and throwing armed grenades into a heating chamber. Preferably yelling 'fire in the hole!' each time.
fulafel 5y ago
To keep your peace of mind, refrain from looking up the energy content of a pizza!
michalf6 5y ago
Is it any worse than having 0.75 of a hand grenade on your lap? If it starts to smoke, you throw it away all the same. Besides, this capacity is standard in larger laptops, but not in smaller ones for some strange reason.
- hnbad 5y ago
  > If it starts to smoke, you throw it away all the same. No. If it starts to smoke, you commit & push --force, then you throw it away.
  - KMnO4 5y ago
    You can save a couple seconds with git-fire. https://github.com/qw3rtman/git-fire https://github.com/qw3rtman/git-fire
franga2000 5y ago
1.5 hand granades worth of LOW VOLTAGE ELECTRIC energy released into A CIRCUIT over A DAY or more and protected by multiple safety cut-off circuits with thermal and other sensors. vs A grenade releasing that as KINETIC energy into YOUR FACE over the span of LESS THAN A MILLISECOND and protected by a spring and a keychain ring. Even if a lithium battery of that size experienced a critical failure right in your lap, you'd get away with a few scars and some serious but treatable burns. And I've only heard of one commercial product in the last 15 years that had serial critical battery failures...
littlestymaar 5y ago
A chocolate tablet typically stores 4000kJ of energy. Yes that's 15 hand grenades, what are we waiting for: ban chocolate tablets now! And don't get me started on flour, not only it stores a ton of energy (50 grenades per kg) but it's also highly explosive! [1] [1]: (only with the right air to flour ratio of course, but accident happen every once in a while: https://www.grupa-wolff.com/a-tragic-flour-explosion/ https://www.grupa-wolff.com/a-tragic-flour-explosion/)
- ddalex 5y ago
  The chocolate bar doesn't start a violent fire if pierced. If it would we could power our laptops with chocolate :) The flour conditions of exploding are far more difficult to achieve than a LiIon battery conditions - orders of magnitude difference.
  - littlestymaar 5y ago
    > The chocolate bar doesn't start a violent fire if pierced. If it would we could power our laptops with chocolate :) Neither does a NiMH battery. There's no link between vulnerability to external damage and ability to power a laptop. In fact, there's no fundamental reason why we couldn't run our laptop on chocolate[1], just that it's very far away from current technology. [1]: http://large.stanford.edu/courses/2014/ph240/ho2/ http://large.stanford.edu/courses/2014/ph240/ho2/
    - WesolyKubeczek 5y ago
      It’s just that modern laptops run on Li-ion batteries.
    - Fire-Dragon-DoL 5y ago
      I read Lion battery (lion as in the chocolate bar) and couldn't help but find it hilarious
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> a 100WH battery a hand grenade typically releases 250kJ, or about 70Wh you're asking for the equivalent of 1.5 grenades in your lap :)

by ddalex 5y ago

> a 100WH battery a hand grenade typically releases 250kJ, or about 70Wh you're asking for the equivalent of 1.5 grenades in your lap :)

chrismorgan 5y ago

Airlines tend to cap lithium-ion batteries at 100Wh, so it’s quite common for laptops and power banks to go to or just shy of that. https://www.apple.com/newsroom/2019/11/apple-introduces-16-inch-macbook-pro-the-worlds-best-pro-notebook/ https://www.apple.com/newsroom/2019/11/apple-introduces-16-i... speaks of a 100Wh battery. My latest laptop has about a 90Wh battery. Hopefully your laptop and hand grenade have radically different power discharge profiles.

ddalex 5y ago
> Hopefully your laptop and hand grenade have radically different power discharge profiles Li battery fires are not unheard of, unfortunately, so the profiles may start to resemble sometimes.
- littlestymaar 5y ago
  Lithium batteries burn, quite quickly but it still takes a few seconds, that can be pretty dangerous indeed but that's several orders of magnitude slower than a grenade.

grenoire 5y ago

The hand grenade is arguably better at releasing that energy at an instant.

r9 5y ago

There's a subtle difference. One is designed to release that energy in a fraction of a second in a frangible metal casing, the other is designed to release it over a number of hours. Yes, batteries can go wrong, just like any tech, but comparing them to hand grenades is just ludicrous.

d110af5ccf 5y ago
> comparing them to hand grenades is just ludicrous Next, let's calculate the energy input required to heat a small cup of coffee and compare that to a hand grenade. (Hint: The coffee wins easily.) I wonder how many hand grenade equivalents a 10 minute lukewarm shower equates to?
- ljm 5y ago
  In some universe there's an internal combustion shower powered entirely by an operator ripping out pull rings with their teeth and throwing armed grenades into a heating chamber. Preferably yelling 'fire in the hole!' each time.

fulafel 5y ago

To keep your peace of mind, refrain from looking up the energy content of a pizza!

michalf6 5y ago

Is it any worse than having 0.75 of a hand grenade on your lap? If it starts to smoke, you throw it away all the same. Besides, this capacity is standard in larger laptops, but not in smaller ones for some strange reason.

hnbad 5y ago
> If it starts to smoke, you throw it away all the same. No. If it starts to smoke, you commit & push --force, then you throw it away.
- KMnO4 5y ago
  You can save a couple seconds with git-fire. https://github.com/qw3rtman/git-fire https://github.com/qw3rtman/git-fire

franga2000 5y ago

1.5 hand granades worth of LOW VOLTAGE ELECTRIC energy released into A CIRCUIT over A DAY or more and protected by multiple safety cut-off circuits with thermal and other sensors. vs A grenade releasing that as KINETIC energy into YOUR FACE over the span of LESS THAN A MILLISECOND and protected by a spring and a keychain ring. Even if a lithium battery of that size experienced a critical failure right in your lap, you'd get away with a few scars and some serious but treatable burns. And I've only heard of one commercial product in the last 15 years that had serial critical battery failures...

littlestymaar 5y ago

A chocolate tablet typically stores 4000kJ of energy. Yes that's 15 hand grenades, what are we waiting for: ban chocolate tablets now! And don't get me started on flour, not only it stores a ton of energy (50 grenades per kg) but it's also highly explosive! [1] [1]: (only with the right air to flour ratio of course, but accident happen every once in a while: https://www.grupa-wolff.com/a-tragic-flour-explosion/ https://www.grupa-wolff.com/a-tragic-flour-explosion/)

ddalex 5y ago
The chocolate bar doesn't start a violent fire if pierced. If it would we could power our laptops with chocolate :) The flour conditions of exploding are far more difficult to achieve than a LiIon battery conditions - orders of magnitude difference.
- littlestymaar 5y ago
  > The chocolate bar doesn't start a violent fire if pierced. If it would we could power our laptops with chocolate :) Neither does a NiMH battery. There's no link between vulnerability to external damage and ability to power a laptop. In fact, there's no fundamental reason why we couldn't run our laptop on chocolate[1], just that it's very far away from current technology. [1]: http://large.stanford.edu/courses/2014/ph240/ho2/ http://large.stanford.edu/courses/2014/ph240/ho2/
  - WesolyKubeczek 5y ago
    It’s just that modern laptops run on Li-ion batteries.
  - Fire-Dragon-DoL 5y ago
    I read Lion battery (lion as in the chocolate bar) and couldn't help but find it hilarious
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