Also, I asked, but
didn't get an answer about if you know what your reserve capacity is?

Shannon,

 

Yes, absolutely enough to get to the ground if I am not more than  50+ NM out over water or ground fog when all main electrical is lost.  Anything else is conjecture.  If I have a passenger, I will push it ( gender  and species neutral) out for greater range, along with baggage, tiedowns, spare tools and tire, tow bar and diet bars.  On second thought, I'll keep the diet bars and the Glock 27 (especially if over WI). 

 

I do replace my 28 Ah battery every two years and the old ones are still operating my tractor starter, generator, weird experiments, etc. 

 

I once left my essential bus switch on for a week and that battery would not recover or hold any charge above 7 volts.  "Why?" You ask.  Because if the master is left on, usually the master relay will fail to stay engaged below 7 volts although the coil will continue to slowly drag down the battery, while the essential bus will activate incandescent lights and other items and that draw will quickly drag the battery down to zero.  This can certainly permanently damage the battery.

 

Note that I have recently installed a "Battery Tender" pig tail (15 A in line fuse) so that the plug is accessible thru the console glove box.  This device can slowly charge a sealed battery and utilizes a float voltage (about 13 VDC) to keep it topped up.  My electric motorcycle jacket liner can be plugged in to keep me warmer on cold winter night flights.  Remember that most automotive chargers will continue to raise the sealed battery's voltage beyond 15 VDC thus eventually leading to it's destruction.

 

 Scott Krueger
2003 Air Venture Cup Racer #94
Sky2high@aol.com
LNC2 N92EX IO320 Aurora, IL (KARR)