What charger or power adaptor can I use with the IQOS 3 DUO Pocket Charger?
You should only charge the IQOS Pocket Charger with the approved IQOS Power Adaptor model supplied in the box or available from your local IQOS point of resale or online. The approved IQOS AC Power Adaptor models are: S52A21, S21A20, S21A22, S21A23, S21A25, and S21A27, with an output of 5.0V 2.0A.
From the official Iqos 3 Duo Pocket Charger manual, page 12
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