MissBlossom
Voltage has nothing to do with the energy content of a battery. You need a given voltage to drive something, so you best look at voltage as a separate factor that just has to match between battery and device you want to power.
Energy content is measured in Ampere hours.
Ampere is the current (imagine the flowing water). If your current is stronger, the content of a given bucket of water will flow over less time until it is empty. And vice versa, reduce current to a trickle and it will flow for a very long time.

      Ines

      I kindly suggest splitting all messages from the "Frustration-"Thread since https://unwedchastity.org/d/907-frustration/127 incl. the one at hand to a separate "Batteries and Charging"-Thread.

      Besides, regarding fast charging and in addition to Tjc's correct remarks ...

      Tjc At 5 volts. Traditional USB is 5 volts. Some of the newer USB-C power supplies allow the device (like a phone or tablet or iPad) to negotiate a higher voltage and higher amperage to allow faster charging. These devices are marked PD (Power Delivery)

      ... I just want to say, that besides USB Power Delivery there have been further proprietary fast charging techniques - like Qualcomm Quickcharge, Samsung [...] Fast Charging, ... etc. I presume most predate USB-PD, yet some seem to have gotten additional revisions after USB-PD arrived. Generally, if you don't know by heart, you have to look up and check involved devices' specs (incl cables!) to find out which "standards" they are compatible with.

      For more details: See a (heavily ad-ridden but relatively comprehensive) overview here: https://www.digitaltrends.com/mobile/how-does-fast-charging-work/

            WriterAlexis No, energy is what counts in the end. Actually from an engineering point of view energy that the battery can provide in an acceptable voltage/current range.

            OTOH, for specific batteries (e.g. for cell phones), the voltage is usually well understood, so you can get away with specifying the current.

            For DC, UIt gives you energy. And for AC it gets way more complicated, which might be also a reason why EV batteries that are capable to be charged via built in AC chargers are specified via Wh which nicely hides all that complexity without being wrong.

              Owl It's even more complcated. Quickcharge 4 is a rebadged PD.

              (Happens all the time: Thunderbold 4 is actually USB4 with a number of optional features ticked as non-optional. Thunderbold 3 OTOH was a completely different beast, as "extend your PCIe bus over a cable" thing. Which is if I remember correctly, interestingly an optional feature of TB4 ports for backward compatibility)

                youdontknowme
                Don't know what your problem is.

                "John" solved her car problem, as she mentioned that her husband was at the moment busy and not available.

                Very problem solving oriented. 😆

                  WriterAlexis If you get hurt on a scooter, you were probably doing something dumb. Like riding an electric scooter.

                  best comment and 100% agreement 😂 👍️

                  But please, this no longer has anything to do with frustration, even if my frustration about the ban on combustion cars is very strong