No, the new IQOS 3 Pocket Charger isn’t compatible with previous versions.
If you insert the IQOS 2.4 PLUS Holder into the IQOS 3 Pocket Charger, the Holder won’t fit because they’re different sizes.
If you accidentally insert the IQOS 3 Holder into the IQOS 2.4 PLUS Pocket Charger, the Pocket Charger lights will start blinking, but the Holder won’t charge.
Make sure you always charge your IQOS 3 Holder with the IQOS 3 Pocket Charger.
Can I charge different IQOS versions with the same AC Power Adaptor?
You can use the IQOS AC Power Adaptor from previous devices to charge your IQOS 3 device. But the IQOS 3 USB cable has a USB-C port which is different from previous versions, so please make sure you use the right cable.