If Discmans work on two 1.5v batteries, why are AC adaptors 4.5v?

Discussion in 'Discmans, Minidisc, DCC and other players' started by RCH, May 22, 2025.

  1. RCH

    RCH New Member

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    Sorry if this is a stupid question, but I'm perplexed. All of my Discmans / CD Walkmans run on 2 AA batteries (i.e., 3vDC). But all of the period-correct Sony AC adapters I can find for them provide 4.5vDC.
    Can anyone explain why?
     
    RCH, May 22, 2025
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  2. Jorge

    Jorge Well-Known Member

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    no relations, except that DC is higher than battery voltage, to be able to charge rechargeables without any step-up converters

    my favorite Discman, Sony D-90, needs 9V AC/DC adapter but also works off 4.2V BP-2 rechargeable battery or EBP-2 adapter for two AA alkalines
     
    Jorge, May 22, 2025
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  3. RCH

    RCH New Member

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    Ah -- thank you for clearing that up for me, Jorge! :thumbsup2:

     
    RCH, May 27, 2025 at 9:16 AM
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