In Short: What voltage is output by the Palm Zire31/72/TungE travel charger??

Long: I have a new Zire72 PDA, but it came with the stupid USA BRICK ac adapter.. weighs a ton, and is fixed to 120V-60Hz. So I want the PalmOne travel charger kit to replace it. I have a similar kit already for a Zire21, but the voltage is 5.5V versus the 5.2V from the Zire72 stock brick.

Does it matter?

Cheers