Building a AA charger for 3DS

Discussion in 'The Projects Forum' started by jellytot, Jul 10, 2014.

  1. jellytot

    Thread Starter Member

    May 20, 2014
    72
    0
    We have a 3DS that we take everywhere. I'd like to build a portable charger using AA's. On the wall wart (AC adapter) it says the output is: DC 4.6V, 900mA.

    My current parts list:
    Case for project
    3 AAs in series
    Battery holders
    3DS charging tip (I can get this)
    wires/solder/glue

    I don't think I need a voltage regulator since 3 AAs in series should be sufficient (please correct me if I'm wrong).

    I'm a electronics newbie. Here's are my questions. Because a 900mA draw is alot, do I need a Current regulator? Does such a thing even exist? Once the current left in the batteries can't supply 900mA, what will happen? Will the 3DS continue to charge? Will it damage the 3DS?

    Thanks in advance!
     
  2. Dodgydave

    Distinguished Member

    Jun 22, 2012
    4,988
    745
    A mains adapter will keep providing the current when needed, batteries will only be able to provide for a short time until they start to reduce voltage, and go flat.
     
  3. jellytot

    Thread Starter Member

    May 20, 2014
    72
    0
    So should I add more batteries (say 4-6 in series) and add a voltage regulator?
     
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