Announcement

Collapse
No announcement yet.

Wat is the max can draw?

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Wat is the max can draw?

    Suppose i have a fabricated quality powerbank with 4 li-ions each 2400Ah. Suppose i also have a joule thief 5v to max 20watt 230v ac built-in in a fitting. Can i connect 3 x such fittings to the powerbank with each 20watt bulbs?

    If not, what is the max wattage i can connect to this powerbank?

  • #2
    Originally posted by Gerard Fivewin View Post
    Suppose i have a fabricated quality powerbank with 4 li-ions each 2400Ah. Suppose i also have a joule thief 5v to max 20watt 230v ac built-in in a fitting. Can i connect 3 x such fittings to the powerbank with each 20watt bulbs?

    If not, what is the max wattage i can connect to this powerbank?
    Typo ... 2,400 mAh, not 2400Ah

    35 Watt-Hours = 4 Batteries x 3.7 Volts x 2.4 Amp-Hours

    I will leave the final computation for you.
    HINT: How long can the 35 Whr Battery Bank last with a 60 Watt load connected?

    Comment


    • #3
      Thanks for your reply. I in fact want to ask, can i have a load of 60 watts? Will the three bulbs in my example lightup?

      I presume if i want load an airconditioning with such one powerbank as above and inverter of 5000watt it wont start up.

      Comment


      • #4
        Yes, I know what you asked, but I am not going to "give you a fish".
        You need to learn "how to fish".

        Do you understand this calculation?
        35 Watt-Hours = 4 Batteries x 3.7 Volts x 2.4 Amp-Hours

        If you do, the answer this simple question ...
        How long can the 35 Whr Battery Bank last with a 60 Watt load connected?

        Reply with answer ...

        Comment


        • #5
          Perhaps its better that i refrase the question:

          How can i know the max current draw rating of a li-ion 18650?

          Comment


          • #6
            Originally posted by Gerard Fivewin View Post
            Perhaps its better that i refrase the question:

            How can i know the max current draw rating of a li-ion 18650?
            Look at its datasheet. Broadly speaking, some cells are designed to deliver high power, others have better capacity but a lower discharge limit.
            CS6P-260P/SE3000 - http://tiny.cc/ed5ozx

            Comment


            • #7
              If it says:
              Rapid discharge current 1.3A
              Standard Discharge current : 0.56A
              Max pulse discharge current: 2.6A

              Does this mean that I can have a load of max 2.6A ??? How about if 4 in paralel?

              Comment


              • #8
                You'll need to be able to answer NEOH 's question to do anything with these. 1.3 A * 3.7 V = 4.81 W. 4 in parallel would deliver 19.24 W, maybe barely enough for a single 20 W bulb at full brightness.

                CS6P-260P/SE3000 - http://tiny.cc/ed5ozx

                Comment


                • #9
                  If i read the above calc of 35W/h and 60watt load i can lightup less than half hour. Can i?

                  My intention is to lightup 3-4 minutes 3 bulbs as bright as possible with a infrared nightsensor switch which i can define the delay time myself.

                  Comment

                  Working...
                  X