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High speed charger

  • 29-03-2016 11:24am
    #1
    kevovek
    Closed Accounts Posts: 678 ✭✭✭


    I have an Asus Zenfone max on the way to me next month and I was reading that the charger provided can take up 6 or 7 hours to fully charge the 5000mAh battery. So can anyone recommend a good high speed charger please?


Comments

  • #2
    homer911
    Registered Users, Registered Users 2 Posts: 5,163 ✭✭✭homer911


    For a LiPo battery you are looking at charging at no more than 1C


    C is simply the rate at which it takes to charge or discharge a battery in an hour. (Based on a 100% cycle which we avoid with LiPos, of course.)

    ie a charge rate of 5A * 1 hour = 5Ah so 5A is one C for your 5Ah (5000mAh) battery.


    Watch out for the battery temperature at that rate...


  • #3
    kevovek
    Closed Accounts Posts: 678 ✭✭✭kevovek


    homer911 wrote: »
    For a LiPo battery you are looking at charging at no more than 1C


    C is simply the rate at which it takes to charge or discharge a battery in an hour. (Based on a 100% cycle which we avoid with LiPos, of course.)

    ie a charge rate of 5A * 1 hour = 5Ah so 5A is one C for your 5Ah (5000mAh) battery.


    Watch out for the battery temperature at that rate...

    OK cheers for the info I think I understand... So a 4.2A charger would be suitable for me then?


  • #4
    ED E
    Registered Users, Registered Users 2 Posts: 36,170 ✭✭✭✭ED E


    The reason the included charger takes so long is because just blasting the cell with current nukes its longevity.

    The low tier SoC its built on doesnt support quick charge so you're better off just slow charging it. 2-2.5A at the most (thats enough for a Gen1 iPad).


  • #5
    kevovek
    Closed Accounts Posts: 678 ✭✭✭kevovek


    Ah ok cool I have a 2.0A charger for my tablet so that will do me then I'd say.


  • #6
    Kavrocks
    Registered Users, Registered Users 2 Posts: 2,345 ✭✭✭Kavrocks


    kevovek wrote: »
    OK cheers for the info I think I understand... So a 4.2A charger would be suitable for me then?
    No, your phone when charging will only draw the correct amount of current for it. You could use a 4.2A charger but the phone might only draw 2A.

    The processor in your phone supports Qualcomm Quick Charge 2.0. If the phone supports it then this type of charger will be the fastest. It will still take a long time to charge because the battery is so large.

    You don't want to damage your phone or battery by sending too much current through it.


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  • #7
    dilallio
    Registered Users, Registered Users 2 Posts: 2,728 ✭✭✭dilallio


    I use this one - only 9 euro in IKEA. It has 3 ports which can supply 2.4A each.
    I have an Anker 21100 battery pack and thie IKEA charger charges it fully overnight.

    http://www.ikea.com/ie/en/products/lighting/light-bulbs-accessories/koppla-3-port-usb-charger-art-20291890/


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