Can I use IQOS AC power adaptor and USB cable from the previous device version to charge the IQOS 3 DUO device?

You can use the IQOS AC Power Adaptor from your previous IQOS devices. But the IQOS 3 DUO USB cable has a USB-C port, which is different from the IQOS 2.4 PLUS so please make sure you always use the right cable.