Use a 78st105 from Texas instruments.

96% efficient at 1.5 amps.

They also do a 3 amp part.

http://focus.ti.com/lit/an/slta010a/slta010a.pdf for an application
note.

a couple of external caps and you are away.

PS I have a tube full of them if you are just looking for one or two!

Ian

Larry wrote:
(Floating Mind) wrote in news:19445-4492F1B5-514
@storefull-3115.bay.webtv.net:

Thanks for the tips! I think I'm going to go with Larry's suggestion
and build the one he posted. The 110V adapter that came with the unit
states that it has a 2.4 amp output, but I'm sure that's only required
during charging.

Ok, so let's use a bigger regulator...(c;

http://www.linear.com/pc/downloadDocument.do?
navId=H0,C1,C1003,C1042,C1033,P1005,D4236

oops, sorry for wordwrap. This IC regulator won't even get warm at 5A
load....it's a SWITCHER, which is what I always prefer...(c;

Build this one and have 5V power to burn...er, ah, charge...(c;