Leo, stand back, back away from the SLA's, let them go :wink:
Other issues with 95% of SLA's is the way they are AH rated, I know the 7 & 12amp units I had were rated at those capacities when drained over 20hrs. Hence when people started switching over from SLA to NiCD they found they could run on nearly half the capacity (7.2AH Nicd's instead of 15AH SLA's).