I came across this TAS Auction which includes a so-called "USB Power Adapter" that directly connects the calculator AC adapter pins to a computer USB port. Since this is a Classic series calculator, its AC adapter has two separate outputs to operate the calculator, approximately 5 vdc, and to charge the battery, approximately 17 vdc. So I don't see how a USB cord could do this. Also, I don't see how a USB port could provide sufficient power for these tasks. So I ask, can this device actually work, and if so how?
Can this actually work?
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