
Plug the wall charger pin end into this Charge-only Adapter ...

... Then plug the adapter into the wide socket at the bottom of the iPAQ. If it doesn't easily push in place, flip it over and try the other way. Squeeze the sides to remove it from the iPAQ.

(The round hole on the right is for an earphone headset.)
There is also a USB Sync cable included in the iPAQ package:
By itself, the Sync cable is used to synchronize data like your address book,
between your computer and the iPAQ. But it can also be used to charge.
The wide iPAQ plug of the sync cable has a round socket that will accept the pin
end of the Wall Charger, so you can charge and sync at the same time.
Although not included in the iPAQ package, you can optionally buy (at very low cost) a USB-A to Mini-B cable and charge the PDA through the Mini-B socket. This is especially useful for charging the PDA while driving in your car. This type of accessory equipment is low-cost and widely available in stores and on the internet. (Click pics for price examples on Amazon.)