How Does Fast Charging Work?
Techquickie
·Techquickie
·2018-05-06
·
834 words · ~4 min read
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chances are that you don't give more than a few seconds of thought each day
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to charging your phone hopefully you remember to do it before you go to bed
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and that's about it right what if you just kind of passed out after a night of
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heavy drink uh cs go and woke up the next day realizing you forgot to plug it
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in your battery bank is in a nightclub couch cushion somewhere and you have to
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leave the house in half an hour enter fast charging a feature supported
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by some modern phones and tablets then you power it up in the time that it
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takes to have a rinse only shower grab a cereal bar and get your shoes on you see
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the reason many devices take such a long time to charge normally is the limited
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amount of power many common wall chargers can push to your phone or
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tablet at once typically 5 watts or less
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this is a design choice that keeps manufacturing costs for basic wall warts
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low and also ensures that the relatively small batteries inside of mobile gadgets
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won't fry from being overloaded with too much power but in reality many mobile
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devices can handle more than this thanks to internal circuitry that sets a
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maximum amount of wattage that will hit your battery at one time fast chargers
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take advantage of that by adjusting the voltage amperage or both to deliver up
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to 20 watts or even higher if your
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device supports the technology whoa whoa whoa hold on a second luke
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supported technology what needs to be supported we're just clobbering a
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battery with electrons well there are a lot of factors but one
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of the most basic ones is that with higher power comes higher heat so a
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device without enough internal room for the battery to expand might end up
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damaged if it gets charged too quickly so for that reason many companies that
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developed fast charging technology have implemented a handshaking process
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between the charger and phone or tablet
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to make sure they're both certified to support the extra power samsung's fast
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charge and oneplus dash charge are both popular protocols but perhaps the most
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widespread one is qualcomm quick charge which is found on a large number of
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Android devices so this means that just because the charger says it supports 2.5
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amps at 5 volts doesn't necessarily mean that it'll charge your phone super fast
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and there are other caveats as well although many devices that support fast
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charging do come with compatible chargers you'll pay a premium for extra
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ones and you might need to buy slightly nicer cables too as cheap thin 28 gauge
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cords often can't handle the extra current very well also remember that as
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we mentioned fast charging can generate more heat which is harder on your
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battery and may shorten its longevity a real concern now that so many phones are
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very difficult to open if you want to put in a new one plus fast charging is
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much more useful when your battery is significantly drained and you need a
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really quick partial charge to keep you afloat for a little while speeds tend to
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taper off significantly as your phone gets closer to 100
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so unlike filling up at a fast pump gas station for the big rigs don't expect to
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go from empty to full with blazing speeds though at least you won't have to
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pay 50 bucks every time you need a recharge or more
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Linus all right guys like the video if you liked it just like dislike it get subscribed hit the little bell and get
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comments title suggestions video suggestions for
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things that we should cover not not title suggestions we we got that covered i'm going to uh
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i'm gonna go uh fight someone with this