Compaq iPAQ 253508-B21 New Universal Auto Adaptor for 1900, 3600, 3700, 3800, 3900, 5400 series Car adapter for your Compaq iPAQ handheld organizer Recharge your battery while on the road Lightweight design for travel Worry less about your battery and save time Compatible with Compaq iPAQ 3100, 3600, 3700, and 3800 series Pocket PCs