On Dec 9, 3:15*pm, Todd wrote:
I use a 1" nylon strap (heavy duty) with a METAL
BUCKLE...

I've used a very similar setup with good results. The battery box I
built for my HP-11 was one of my very first sheetmetal projects, and I
tested it and the retention strap to about plus or minus 12g. That
means I could stand my 140 lb weight on it without yielding, and I
could safely apply the same force upwards to the strap.

However, one thing I didn't know at the time is that nylon is rather
sensitive to acids, and loses strength quickly when so contaminated.
Given that the S in SLA is for "sealed," under most circumstances
there's no chance of spillage. But the A does stand for "acid," so it
pays to keep an eye on the battery to make sure it doesn't leak, and
on the strap to make sure it isn't becoming brittle or discolored.

Thanks, Bob K.