On Sat, 25 Feb 2012 00:46:15 +0000, John Rumm
wrote:

That is just one ****ed-up bit of design if something as simple as a
battery disconnect on depletion to a setpoint is not included.

would make no difference - the battery will eventually die (permanently)
even if not connected since it will self discharge.

But it would buy some extra time and an auxiliary battery (just a
small one) could sound a low-charge alarm.