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Next-generation lithium cells will double phone's battery

  1. #11


    What I read before about the super capacitor was the guy invented some surface that stored a lot more electrons. The great advantage of capacitors is instant charge. Of course the release time is the problem.

    Thanks for the info, guys! I enjoy this kind of exchange.

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  2. #12


    United States
    Posts : 3,093
    Windows 8.1 Pro 64-bit


    Quote Originally Posted by jimbo45 View Post
    Hi there.

    Samsung S5 (with latest update from Android) seems to do pretty well -- I can usually get through an entire day with still around 15 - 20% remaining -- before the update I would have needed a "Lunch Time" recharge / top up. Maybe some of these phones should have a trickle solar charger -- even if it can't charge the whole phone completely it would perhaps give people 1 or 2 hrs more before they have to connect to a mains supply.

    Whatever the efficiency of the battery you can't break the laws of physics -- if your phone uses so many WATTS then you will need the same nr of watts to re-charge it --Ohms law P (Watts) = I (amperes) * V (Volts). Your battery needs to supply so many mA /hr to be able to supply the phones need whatever technology you use.

    For our more "Technologically challenged colleagues " :

    https://answers.yahoo.com/question/i...6115528AAnhW8r

    Cheers
    jimbo

    I love Ohm's Law, so helpful in many situations and easy to remember. One of the first things they teach in trade schools.
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  3. #13


    Hafnarfjörđur IS
    Posts : 4,376
    Linux Centos 7, W8.1, W7, W2K3 Server W10


    Quote Originally Posted by popeye View Post
    Quote Originally Posted by jimbo45 View Post
    Hi there.

    Samsung S5 (with latest update from Android) seems to do pretty well -- I can usually get through an entire day with still around 15 - 20% remaining -- before the update I would have needed a "Lunch Time" recharge / top up. Maybe some of these phones should have a trickle solar charger -- even if it can't charge the whole phone completely it would perhaps give people 1 or 2 hrs more before they have to connect to a mains supply.

    Whatever the efficiency of the battery you can't break the laws of physics -- if your phone uses so many WATTS then you will need the same nr of watts to re-charge it --Ohms law P (Watts) = I (amperes) * V (Volts). Your battery needs to supply so many mA /hr to be able to supply the phones need whatever technology you use.

    For our more "Technologically challenged colleagues " :

    https://answers.yahoo.com/question/i...6115528AAnhW8r

    Cheers
    jimbo

    I love Ohm's Law, so helpful in many situations and easy to remember. One of the first things they teach in trade schools.
    Hi there

    Even easier way to remember is "Voltaire was a Roman Catholic" -- he might have been I don't know - but it doesn't matter.
    But translated into the physical formula is I= V/R where R - resistance, V - Volts and I - Amps. Swapping a bit around you get V = R * C - Change the C (current for I Amps) and you see where the expression comes from.

    Cheers
    jimbo
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  4. #14


    India
    Posts : 1,536
    Win 8.1 Update x64


    Capacitors are the one that's going to face a huge advancement in any field I suppose, at least the ones related to storage devices & semiconductors...which in turn is controlling our technology in its axis...
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  5. #15


    Ohms law and stuff like that is just fine but problem is in efficiency. Today's batteries, even most advanced ones are woefully inefficient. Can do just a fraction of theoretical values. Chemical processes can do just so much and than exponentially loose what was used to start a processes of converting energy. Capacitors hold better promise because they do not convert chemicals to different states. Capacitors have internal and external leaks that have to be stopped and at same time by it's nature they have to be conductive but energy contained until needed. There are so any electrons that have to be removed from one polarity side to another to make potential ie, differential of their number on plus (electron deficiency) to negative ( surplus of free electrons) side. That takes energy to do and has to stay in highly conductive environment until released thru lets say electric motor, light bulb, transistor or what ever so that energy can be converted from one to another. Considering that energy can not be made or destroyed and could just be converted from one to another, any loss (and it's inevitable) has to be reduced to smallest level possible or you have to introduce many times higher energy for modest gains to output.
    On the other hand, even if an ideal battery could be made this second and all the cars converted to electrical, there would be no power left for our computers. So everything has to go with pace of slowest part and that's producing enough to replace energy produced by fossil fuel (most is produced that way still). So any development has to go in very tight spiral or things are going to unravel fast.
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  6. #16


    Sydney, Nova Scotia, Canada
    Posts : 6,490
    Windows 10 Education 64 Bit


    Being a retired electronic technician I could not resist.

    Click image for larger version

    One of the first things I had to memorize.

    If only it was as simple as P = I x E. It can get complex as there is resistance in the cells, capacitance between the cells and maybe even some inductance rolled in. All of this effects the charge and discharge rates.
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  7. #17


    United States
    Posts : 3,093
    Windows 8.1 Pro 64-bit


    For sure, when you start getting into inductive and capacitive circuits, things get much more complicated.
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  8. #18
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  9. #19


    Hafnarfjörđur IS
    Posts : 4,376
    Linux Centos 7, W8.1, W7, W2K3 Server W10


    Hi there

    Don't forget the IMPEDANCE as well - especially if considering alternating current -- then mathematicians have their favourite number represented by i (which is the square root of - 1 and called an imaginary number -- but without this little symbol a lot of modern science would never have been done).

    The problem with any sort of battery is that a device requires power - 50 mAh battery has to be capable of supplying 50 milliamps for 1 Hour and this generates HEAT which is hard to get rid of in a small device. This heat is caused by the inevitable resistance in the electrical circuits of the device.

    Solar cells don't yet supply enough juice for the modern smart phone - especially the newer ones with large screens and very high video resolutions.

    Look at Electric cars -- it really doesn't matter how environmentally clean they are until the RANGE can be considerably increased. (Thank goodness they are making some decent looking ones now - electric cars always used to look like they had been designed by those "60's Flower people")

    Very few people want a car that will only go about 120 KM before it needs re-charging -- the whole point of a car is that YOU use it whenever you want to and you might want to do a 400 KM journey. Electric cars that can go about 400KM on one charge is probably "the tipping point". Anything less and whatever the environmental costs of using gasoline the public just aren't interested. Local buses / taxis etc might have a use for these as they can be swapped and re-charged during the day several times if needed.

    Current chemical methods of battery operation are probably reaching the end of the road -- a new technology is needed -- I've no idea -- over to you youngsters to provide the answer -- whoever does it first certainly won't have to worry about paying their bills for the rest of their life.

    Cheers
    jimbo
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  10. #20


    It still comes down to efficiency of transferring between different forms of energy, less steps the better. Electricity seem to be best medium for that.
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Next-generation lithium cells will double phone's battery
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