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Battery sizes, build, boxes, plates, acid size, terminal size, lead compound, plastic compound, space for spent lead, space for acid electrolyte, cell covers, no cell covers, venting, no venting, gel acids, robustness of the shell...and costs to make the thing all govern the actual cost of the battery.
But one make , style may be promoted because of marketing, because of supply. For get demand because demand is built in.
Batteries come in 2 basic types: automotive and deep cell and some come in between.
Automotive: frequent charge and discharge to 20% of total where a 12 V battery is considered dead at 11V
Deep cell:constant draw down to 80%, larger heavier battery. Rule of thumb, if you can lift it, it's not a deep discharge.
Middle: Some makers make a battery that has characteristics of both types.
Decision for our cars.
To replace a battery: Size is critical it must fit the designated location. Based on no modifications.
Get the largest Amp/Hr rating that will fit
Get the biggest reserve
Get the best CCA
With all these things is it well built? Will it fit, is there a good warranty, will the terminations fit the cable, are there cell caps to each cell, are the cells big enough for a battery hydrometer. Are the terminations big enough, robust enough, are the bolts/nuts sizable and placed to easily be used?
NO SUCH THING AS MAINTENANCE FREE, that is a marketing ploy, like 10,000 mile oil changes.
Cheap Chinese made batteries are cheap in every way, the cheapness may not be apparent in the store if something else is not there to compare. But without a specification to allow comparison, price may be meaningless. And a cheaper price does not indicate a cheaper battery be sure to check the published specs. And if buying and you find the published specification to be a small blurb with no real facts, that product is a mass produced battery that may let you down.
My experiences with batteries are to buy a good quality one, look after it and get 7-10 years out of it. The same went for buying cars and get 15-20 years out of them.
But now I don't relish being under them, so the time interval may be 2-3 years and get a new one.