My experience says that a battery powered device probably has some regulation and that the devices actually operate at a much lower voltage. If there were no regulation the device would not operate well as the voltage of the batteries lowered. Try the 2.4 vdc as long as the polarity is OK. Why not just get one of the universal supplies at Radio Shack. I have a couple of these and they're life savers.


John
ESI Gigaport HD+
Lenovo Turion II /4 Gig Ram/ Win7x64 be
15.6" Monitor
"The only Band is a Real Band"
www.wintertexaninfo.com/BANDS/JohnnyD.php