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Joined 3 years ago
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Cake day: July 4th, 2023

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  • 98% of hydrogen is currently made from fossil fuels.

    While it’s possible to make hydrogen from renewable electricity, you immediately lose at least 60% of your energy in the electricity to chemical to electricity conversion steps. For comparison, batteries only lose 5-10% in the round trip charging.

    Hydrogen really only makes sense in applications where batteries can’t be used, or efficiency is not relevant. So many companies have publicly announced their new hydrogen vehicles, then quietly stopped using them and started using battery electric vehicles instead.

    Hydrogen just costs too much, and the hard limit of chemical efficiency means it will never be cheaper than batteries.







  • Are you using a rechargeable battery?

    AA batteries are typically 1.5V, but some rechargeable ones are only 1.2V. This leads to the product thinking the battery is always low even when it’s fully charged.

    If you have a Li-ion rechargeable, you get the opposite problem. The battery is actually around 2.7V, and has a converter internally to step it down to 1.5V. You will keep getting 1.5V until the battery goes flat with no warning.



  • 18107@aussie.zonetolinuxmemes@lemmy.worldOP doesn’t like Linux
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    1 month ago

    It’s not easier than Windows, it’s the devil you know.

    Sure it’s slow, but you know how slow. It does updates at the wrong time, but you know it will turn on again eventually. It sends all your data to Microsoft, but no-one has come to your door to harass you because what’s in your data.

    Linux is some obscure thing that would take time and effort to learn, and you’re tired from work and just want to use a computer without thinking about it.

    Things might be different if Windows wasn’t the default/only option when buying a new laptop.