On Fri, 29 Jul 2011 23:11:24 -0600, Tony Hwang wrote:

How about installing solar panel to trickle charge new
batteries during day time.

That 'would' have worked! The problem was my fault, for mowing over the
barely buried wires; and, of course, for leaving the batteries off the
charger for so long.

I just didn't realize these sealed 'dry' 7 amp 12 volt lead-acid batteries
were so fragile.

I even tried putting 120 volts across the terminals with a jumper wire; but
even that failed to resurrect the batteries. They've been on the trickle
charger for days - and absolutely nothing. Not even heat!

The fact there's no current and no heat and no open-source voltage tells me
they must have developed an 'open' somehow.