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The iPhone 11 Pro Max has a 15 watt-hour battery. If it lasted a week on a single charge, it would need a 105 watt-hour battery. That's the same amount of energ

by ggreer 7y ago

The iPhone 11 Pro Max has a 15 watt-hour battery. If it lasted a week on a single charge, it would need a 105 watt-hour battery. That's the same amount of energy in 90 grams of TNT.

oblio 7y ago
Hmmmm: https://www.theguardian.com/technology/2019/oct/09/iphone-11-pro-max-review-battery-camera-screen https://www.theguardian.com/technology/2019/oct/09/iphone-11... "The iPhone 11 Pro Max beats that estimate by some margin, lasting just minutes shy of a full 48 hours between charges." For 1 full week we need 3.5x capacity. Plus, at a certain point, the gap between (weak) explosives and batteries becomes really small. After all, the main difference is how they release that energy :-)
- lostmsu 7y ago
  Meh, my Mi Max 3 usually lasts 72 hours under moderate use (RSS, browsing, periodic navigation), and closer to 90 when I spend most of the time at home, only reading from it in the morning or late night.
scottlocklin 7y ago
>it would need a 105 watt-hour battery. That's the same amount of energy in 90 grams of TNT. It's the same amount of energy as 11 milliliters of gasoline or a third of an ounce of fat on a piece of steak. Batteries (and explosives) are shitty at storing energy compared to hydrocarbons.
- ggreer 7y ago
  Danger comes from energy density and ability to release that energy quickly. Fat doesn't explode. Neither does gasoline, though I wouldn't be comfortable carrying 11ml of gasoline in my pocket. Existing batteries sometimes do explode and cause injury. The problem would be far worse if they had 7x more energy in them.
  - scottlocklin 7y ago
    I did use the example of gasoline, but I don't know why you'd be uncomfortable carrying 11ml of it in your pocket. Let's change it to 11ml of ethanol which is basically the same energy density. In principle you should be able to extract the energy using a fuel cell or even a heat engine. Since we're talking about futuristic cell phones, it seems more than possible to squeeze more energy into Captain Kirk's federationphone.

by ggreer 7y ago

The iPhone 11 Pro Max has a 15 watt-hour battery. If it lasted a week on a single charge, it would need a 105 watt-hour battery. That's the same amount of energy in 90 grams of TNT.

oblio 7y ago

Hmmmm: https://www.theguardian.com/technology/2019/oct/09/iphone-11-pro-max-review-battery-camera-screen https://www.theguardian.com/technology/2019/oct/09/iphone-11... "The iPhone 11 Pro Max beats that estimate by some margin, lasting just minutes shy of a full 48 hours between charges." For 1 full week we need 3.5x capacity. Plus, at a certain point, the gap between (weak) explosives and batteries becomes really small. After all, the main difference is how they release that energy :-)

lostmsu 7y ago
Meh, my Mi Max 3 usually lasts 72 hours under moderate use (RSS, browsing, periodic navigation), and closer to 90 when I spend most of the time at home, only reading from it in the morning or late night.

scottlocklin 7y ago

>it would need a 105 watt-hour battery. That's the same amount of energy in 90 grams of TNT. It's the same amount of energy as 11 milliliters of gasoline or a third of an ounce of fat on a piece of steak. Batteries (and explosives) are shitty at storing energy compared to hydrocarbons.

ggreer 7y ago
Danger comes from energy density and ability to release that energy quickly. Fat doesn't explode. Neither does gasoline, though I wouldn't be comfortable carrying 11ml of gasoline in my pocket. Existing batteries sometimes do explode and cause injury. The problem would be far worse if they had 7x more energy in them.
- scottlocklin 7y ago
  I did use the example of gasoline, but I don't know why you'd be uncomfortable carrying 11ml of it in your pocket. Let's change it to 11ml of ethanol which is basically the same energy density. In principle you should be able to extract the energy using a fuel cell or even a heat engine. Since we're talking about futuristic cell phones, it seems more than possible to squeeze more energy into Captain Kirk's federationphone.