How many use SEALED LEAD ACID - NON PMA'd?

I use B&C 28 AH SLA battery and B&C LR2x regulator.  The battery is secured for up to 9 G's + and 4 G's - behind the co-pilot seat in a non-vented compartment since it is sealed.  This battery may be positioned in any orientation although mine is installed upright for easy access to the +/- terminals.  A Battery Tender (tm) pigtail plug is available in the center console glove box for topping up the battery.