Q: What kind of AC adapter does the 100/200LX use?

A: The 100/200LX does not include an adapter in the box. An optional adapter is available from HP (part # HP F1011A, price: $39.95). The 100/200LX uses 12VDC, negative tip, up to 750mA, approx 5.5mm OD barrel-type connector. The HP adapter is about the size of a deck of playing cards, and comes with fold-away AC prongs. It will take any input voltage from 100 to 240 Volts, at 50/60 Hz, an advantage for world travelers.

A Radio Shack AC adapter (Cat.# 273-1652B) is less expensive and seems to work with the Palmtop. Its only rated at 500mA, so there may be problems when using with high-current PC Cards (i.e., modem cards). It appears to work well while charging NiCds, and current measurements indicate that the 100/200LX draws much less than 500mA with this adapter even when writing to a flash card, charging NiCds, and using the serial port simultaneously.

Other compatible adapters are certainly available from various sources.