(ET) 30 volts?

[Larry Chace <RLC1 etnainstruments com>]

While snowthrowing yesterday with the I-5, it suddenly stopped. 
Operating the main power switch did nothing; the gauges showed 
nothing.  A quick look in the rear battery compartment verified that 
one of the 10-year-old Crown batteries had a melted terminal.  The 
stud was completely disconnected.

We pushed it downhill but didn't get it into the garage.  Just to 
move it the last 50 feet, would it be acceptable to effectively 
replace the dead battery with a jumper wire (6 ga)?  I *think* the 
I-5 (late model) would run on 30 volts, at least enough to get it 
under cover.

Plan B would be replacement of all of the batteries...

Many thanks for any suggestions!

Larry Chace, Ithaca, NY  E15 and I-5