a PS piece where the PS folks cut apart a bunch of batteries. Some had nicely formed plates fully packed with lead dioxide and spongy lead and others had warped plates or plates where the lead dioxide was never put in manufacture.
What does this all mean? It meant hat you often get what you pay for. The QC in some batteries was poor. If the manufacture will not reject plates that have not been fully populated with lead dioxide what else might be overlooked?
If a trojan has 30 holes to a costco's 24 perhaps something like this might be the cause. Of course I don't really know. YMMV
I'm not actually promoting trojans. I did have a set that lasted 8 years and I currently use Deka with about 5 years on them (4 GC batteries).
I would use Rolls if I were heading out for a long time. Something in the L16 footprint. And I would expect them to last 10 years or more.
It comes down to plate size and QC.
Oh by the way the battery
with large sections of missing lead dioxide was an Exide.