>Installing a starting battery would be a bad idea - they are not meant to
>be used infrequently.  They will become unable to hold a charge fairly
>quickly.

It really depends on the usage. You are right, you cannot discharge them
too deeply very often, but that was not the application in question.

>I installed a couple of wheelchair batteries which cost me about $70
>total, IIRC.

Do you know off hand the amp hour rating you get from those batteries? Do
they fit under the driver's seat? That space is frustratingly shallow :-)

Thanks,

John