Hey V...go down to Battery World or something close, perhaps a local auto
parts store...and buy yourself a 14Ahr sealed lead acid battery (gel cell)
and a charger for it.

I run most of my stuff off this type of battery.

No hydrogen build up either.
"Maximus" wrote in message
hlink.net...
Hi.
As a ham radio man, I am hoping you can help me out. I have a DX394
receiver
and usually use ac to power it. I can run from a car battery, with the
adaptor. It requires 12 volts at 500 Ma. What I am wondering is if I can
build an emergency power supply so I can listen using batteries when the
trees take out the power lines s.

What I thought I could do is get a 9v lantern battery and add two 1.5 volt
D
Cells . I am not mathematically inclined in the least. If I connect the
positive of the lantern and the negative of the lantern to the
corresponding
terminals of the two D Cells, and connect all that to the adaptor plug for
the back of the receiver, will it supply sufficient current to run
properly
or not ? I could probably get an actual car battery, but would rather not
have that in the apartment.


V Solidarity