. They are not fragile,and will sustain an amazing amount of stress.Usually,the steel hooks fail before the straps. Most of them are rated at several hundred pounds,some over a thousand..and I can personally attest to their ability to withstand sudden tension without failure. Holding down an 8lb battery is well within their abilities. They are much stronger than the plastic bridges that are used to secure many batteries. All of us trust our lives to webbed straps holding us in our seats during collisions. They work,when mounted properly and maintained. I have never seen a seat belt fail,ever..and they hold down substantially more weight than a battery.
My trust in straps comes from countless years of using them and abusing them.
They have earned my trust. You trust them too..every time you buckle in...
Everything degrades with time,including metals. Who would ever think a wheel rim would break from fatigue?
I remember when polymer framed pistols first came to market,and everyone was screaming disaster. 40 years later,they have proved them to be as strong,or stronger than steel.Many items are now made out of fiber composites,handling all sorts of torture.
Good enough for me!
