COnvert ipod charger to battery power.

Discussion in 'The Projects Forum' started by -e-train, Oct 21, 2009.

  1. -e-train

    Thread Starter New Member

    Oct 21, 2009

    I have a project I am working on for Halloween. I need to convert a ipod charging dock from ac plug in to run on a battery. The draw on the plug converter says that it draws:
    100-240v-50/60Hz 0.45A max
    and outputs:
    9.0V(then a line with three dots below it)1.5A

    I think that means 9volts at 1.5 amp hours.
    The dock charges ion batteries in the speakers, but I don't need that to happen off the battery, so I think I will have a longer life.

    The unit is a Jensen wireless ipod dock and all I need to do is power the signal transmitter.

    Even at 9V/1.5A how would I run this off of batteries?

    I need it to last 6 hours. I don't really get the conversion formulas yet, so I thought it would ask.

    Can batteries (like C or AA) be used to make this type of power?
    If i strung 5 C batteries together, would that do it?

    I am not sure how to figure out how many batteries give me what charge and for how long.

    thanks in advance!
  2. BMorse

    Senior Member

    Sep 26, 2009
    6 C or D sized cells might last you 6 hours:

    6(cells)*1.5(volts approx)=9vdc
    9(volts)/1.5(AH) = 6 hours :confused:

    or you can check the calculations here to include rate discharge calculations and other things.... (or just keep some spare batteries;))

    you will have to connect the batteries directly to the power input on the unit, don't use the wall wart (adapter).

    My .02