Posted for "Tom Gourley" <tom.gourley@verizon.net>:

 I have queried Exide about the L-R-C time constants of a typical 25AH
lead-acid battery, and its reaction to a very brief high-voltage transient
 
 Paul,
 
 Can you quantify "brief"?  What's the ramp rate, shape and width of the
transient?  How much energy is available in it?
 
 Tom Gourley