Just checked out the
http://www.battery-usa.com/Catalog/tel90.pdf , it's a beast.
I might hunt one up for my next long 4x4 trip just to power the Engal. How much did the 90Ah SLA set you back ?
One of these 120Ah batteries
http://allpurposebatteries.com.au/sh...f9563da82bf5ff looks very interesting too.