Can I charge the IQOS 3 Duo with any USB charger?
No, you must only charge the IQOS Pocket Charger with the approved IQOS Power Adaptor model supplied in the box or available from IQOS stores. Do not use third-party accessories with IQOS. The approved Power Adaptor models are: S52A21, S21A20, S21A22, S21A23, S21A25, and S21A27. (Pages 10, 12)
From the official Iqos 3 Duo manual, page 10
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