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Oh, so you don't know. Battery voltage is an S-shaped function of state of charge. For Li-ions except LiFePO4, it's 3.7 +/-0.5V. Charging circuit takes care of

Oh, so you don't know. Battery voltage is an S-shaped function of state of charge. For Li-ions except LiFePO4, it's 3.7 +/-0.5V. Charging circuit takes care of that, and designers take care of current draw so as not to exceed discharge current. No, there's no "3.85V battery". No hidden 5Wh either. Yeah EVs and laptop batteries use Wh because it makes sense there. That's irrelevant(as yet). Y'all are just bunch of arrogant dicks crying you can't divide mAh with mAh and the whole world has to do your homework just for you. No, you can, and that covers 90% of your needs. That is to say, you don't get more precise than that anyway from just sticker figures. Now, go back to Reddit. This is more than enough Reddit-speak for a week.

vel0city 3y ago
https://www.ifixit.com/products/google-pixel-6a-battery-genuine?variant=39912699330663 https://www.ifixit.com/products/google-pixel-6a-battery-genu... Read that label. What does it say? 3.7? Nope! > https://www.amazon.com/2600mAh-Rechargeable-Replacement-Battery-Compatible/dp/B081DZNBVC https://www.amazon.com/2600mAh-Rechargeable-Replacement-Batt... Is this a 3.7V battery? Nope! And I've got a pile of rechargeable batteries here that are 1.5V, 1.2V, and others. https://www.amazon.com/EBL-Lithium-Batteries-AA-Pack/dp/B0CH2ZCJX6 https://www.amazon.com/EBL-Lithium-Batteries-AA-Pack/dp/B0CH... > Yeah EVs and laptop batteries use Wh because it makes sense there. And it makes sense there because...? > Oh, so you don't know. Battery voltage is an S-shaped function of state of charge. I do know that. You don't need to be rude.
- numpad0 3y ago
  I dont understand why do you supposedly know yet pretend to think there is mysterious 5Wh situation. Just makes no sense. Only one of those can be true at the same time. Same for "3.85V battery". If you know you know.
  - vel0city 3y ago
    Because it's not a 3.7V pack, it's a 3.85V pack. I'm at like 78% state of charge and it's still 4.26V. It's obviously not a 3.7V pack. You yourself even mentioned there were 3.6V packs on the market for a while. So if it is a 3.6V pack, a 10,000mAh pack would be 36Wh. This battery is a 3.85V 4410mAh 16.97Wh. If we ignored the voltage, 10 / 4.41 = 2.26x the energy. But 36 / 16.97 = 2.12x. If that 10,000 was the actual same 3.85V that's 38.5Wh. So with that, there's a 2.5Wh difference between what it would have been if the voltage did match. If it's a 20,000mAh pack, that becomes 5Wh of difference for a pack rated 3.6V versus one rated 3.85. Which, as I've shown, it is rated for 3.85V. And you've even agreed, there were packs on the market with an internal pack voltage of 3.6V! > Yeah EVs and laptop batteries use Wh because it makes sense there. And I reiterate, why does it make sense there? Because you're going to juggle a lot of different voltages and amperages when talking charging and we're relying on charging circuits dealing with it. None of what I've been talking about was about getting a little 3.7V pouch to run a small microcontroller or whatever, I'm talking about what actual consumers will really experience in the wild. So I've got phone with a 4410mAh battery and a wall charger rated for 25W. About how long will it take to charge? Need more info! I've got a battery rated 16.97Wh and a 25W charger. Roughly how long will it take to charge? 17 / 25 = .68 so like about 45min. That's the kind of question most consumers are likely to encounter.
    - numpad0 3y ago
      Just a whole lot of nonsense. If you want to splice some 25W charger into your 3.8754568351V battery and blow it up, go do it over on Reddit. Somewhere far enough away from here. You've done nothing meaningful to move the Chesterton's Fence.
      - vel0city 3y ago
        Since you seriously seem to doubt that 3.85V batteries can possibly exist, here's some additional reading for you. But I don't know if I can change your mind with any materials, since I've shown you the actual pack for my phone, you can see the nominal rating, but you refuse it. 3.6V is a thing, 3.85V is a thing. I don't understand why someone who clearly does know a bit about batteries seems to refuse the existence of a 3.85V battery. https://batteryuniversity.com/article/bu-303-confusion-with-voltages https://batteryuniversity.com/article/bu-303-confusion-with-... And sorry, didn't realize it but it's actually a 30W charger I'm plugged into right now. I didn't have to splice anything, it's what came from the factory. Or did you think all phone chargers were also 3.7V? https://store.google.com/us/product/usb_c_30w_charger?pli=1&hl=en-US https://store.google.com/us/product/usb_c_30w_charger?pli=1&... You really didn't need to be nearly as rude in your comments here.

vel0city 3y ago

https://www.ifixit.com/products/google-pixel-6a-battery-genuine?variant=39912699330663 https://www.ifixit.com/products/google-pixel-6a-battery-genu... Read that label. What does it say? 3.7? Nope! > https://www.amazon.com/2600mAh-Rechargeable-Replacement-Battery-Compatible/dp/B081DZNBVC https://www.amazon.com/2600mAh-Rechargeable-Replacement-Batt... Is this a 3.7V battery? Nope! And I've got a pile of rechargeable batteries here that are 1.5V, 1.2V, and others. https://www.amazon.com/EBL-Lithium-Batteries-AA-Pack/dp/B0CH2ZCJX6 https://www.amazon.com/EBL-Lithium-Batteries-AA-Pack/dp/B0CH... > Yeah EVs and laptop batteries use Wh because it makes sense there. And it makes sense there because...? > Oh, so you don't know. Battery voltage is an S-shaped function of state of charge. I do know that. You don't need to be rude.

numpad0 3y ago
I dont understand why do you supposedly know yet pretend to think there is mysterious 5Wh situation. Just makes no sense. Only one of those can be true at the same time. Same for "3.85V battery". If you know you know.
- vel0city 3y ago
  Because it's not a 3.7V pack, it's a 3.85V pack. I'm at like 78% state of charge and it's still 4.26V. It's obviously not a 3.7V pack. You yourself even mentioned there were 3.6V packs on the market for a while. So if it is a 3.6V pack, a 10,000mAh pack would be 36Wh. This battery is a 3.85V 4410mAh 16.97Wh. If we ignored the voltage, 10 / 4.41 = 2.26x the energy. But 36 / 16.97 = 2.12x. If that 10,000 was the actual same 3.85V that's 38.5Wh. So with that, there's a 2.5Wh difference between what it would have been if the voltage did match. If it's a 20,000mAh pack, that becomes 5Wh of difference for a pack rated 3.6V versus one rated 3.85. Which, as I've shown, it is rated for 3.85V. And you've even agreed, there were packs on the market with an internal pack voltage of 3.6V! > Yeah EVs and laptop batteries use Wh because it makes sense there. And I reiterate, why does it make sense there? Because you're going to juggle a lot of different voltages and amperages when talking charging and we're relying on charging circuits dealing with it. None of what I've been talking about was about getting a little 3.7V pouch to run a small microcontroller or whatever, I'm talking about what actual consumers will really experience in the wild. So I've got phone with a 4410mAh battery and a wall charger rated for 25W. About how long will it take to charge? Need more info! I've got a battery rated 16.97Wh and a 25W charger. Roughly how long will it take to charge? 17 / 25 = .68 so like about 45min. That's the kind of question most consumers are likely to encounter.
  - numpad0 3y ago
    Just a whole lot of nonsense. If you want to splice some 25W charger into your 3.8754568351V battery and blow it up, go do it over on Reddit. Somewhere far enough away from here. You've done nothing meaningful to move the Chesterton's Fence.
    - vel0city 3y ago
      Since you seriously seem to doubt that 3.85V batteries can possibly exist, here's some additional reading for you. But I don't know if I can change your mind with any materials, since I've shown you the actual pack for my phone, you can see the nominal rating, but you refuse it. 3.6V is a thing, 3.85V is a thing. I don't understand why someone who clearly does know a bit about batteries seems to refuse the existence of a 3.85V battery. https://batteryuniversity.com/article/bu-303-confusion-with-voltages https://batteryuniversity.com/article/bu-303-confusion-with-... And sorry, didn't realize it but it's actually a 30W charger I'm plugged into right now. I didn't have to splice anything, it's what came from the factory. Or did you think all phone chargers were also 3.7V? https://store.google.com/us/product/usb_c_30w_charger?pli=1&hl=en-US https://store.google.com/us/product/usb_c_30w_charger?pli=1&... You really didn't need to be nearly as rude in your comments here.