How do I turn on the IQOS 3 DUO Pocket Charger?
Press and hold the IQOS 3 DUO Pocket Charger Button for 4 seconds, then release. The Holder Status Lights and Pocket Charger Status Lights will turn on slowly to confirm the device is on.
From the official Iqos 3 Duo Pocket Charger manual, page 4
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