[Elecraft] K3/10 on Battery?

[Jim Miller]

I've got a situation where I might need to operate my K3/10 on a battery.

Since it's a one time (likely) deal I don't really want to drop a wad on 
this.

I've got a 5ah gel cell that I could use. If pressed I could make a 
connection to the car accessory output aka cigarette lighter in the back of 
the van.

The occasion is a QRP fox hunt where most of the 1.5hrs is listening and 
less than 10 minutes of transmitting at 5W.

Thoughts or suggestions welcome.

73

jim ab3cv