Tom Gardner wrote:

Mom's car, sitting for 2.5 years had to be moved. The Interstate 72 mo.
battery that was put in just before storage won't take a charge...no
surprise, I put another new one in. Rather than turning in the core for $12
I will get it replaced under warranty. Is there any way to keep a new
battery on the shelf for extended periods of time? Should I keep it on a
trickle charger? Is it an urban myth that sitting on concrete will kill it?

I use (and love) a device called a "Battery Tender" when I let my motorcycle sit
over the winter. It's about the size of a big wall wart and has lots of ways you
can configure the end that attaches to your vehicle. My bike has a power plug
that's always connected to the battery (intended for heated clothing) so I just
plug it in there. The unit is completely intelligent and flat out works. Every
guy I know that has a big motorcycle has one. It's exactly what you need. - GWE