Interstate was calculating the monthly pro rated credit based upon an inflated list price which is not mentioned in the warranty disclosure. The prorated price you paid was based on a suggested price even higher than the price at which the batteries are typically sold. Class action lawsuit followed.
Costco is in trouble because their free replacement policy is a total joke. You are at least refunded for your original battery but then you have to buy another replacement battery at a higher cost.
I haven't bought a proper Interstate battery in a long time, mainly due to their pricing, nor do I value prorate, so I have no recent experience with their warranty.
With Costco however, I have warrantied a battery in the last few years, and it couldn't get any easier, like returning any other item. No wait for a test, or some parts jockey at another place to figure out their tester may be broken or malfunctioning, and unable to prove that the battery is "bad." The car already had another battery from AAA installed, under duress, so I didn't need a Costco replacement, nor was I required to buy one. Walked out with same cash paid for it.
I wouldn't characterize that as a joke.
In general, Costco's policies are very fair to their customers, and better than average.
If their policies have changed, then that is probably due to abuse, from those whose Costco batteries conveniently fail at the 35 month mark, and get brought in for exchange.
I'm not aware of when it was implemented, or whether it was always the case, but replacements also only carry the remaining term of the original purchase, which is fair, and not an uncommon practice.
The flip side to their customer-friendly policies is that they become subject to abuse, and it cannot be blamed for taking steps to mitigate that. They did the same thing a long time ago by restricting return periods on many electronics items to 90 days, versus the general lifetime satisfaction period.
As far as any beef with expecting a "free" replacement, they aren't advertised with such a claim, only a "Limited Replacement Warranty."
The current warranty terms from their website, dating from 2018, specify that "the battery will be replaced or the purchase price refunded, excluding fees and taxes."
That language does leave the door open to interpretation, so their lawyers will no doubt be prompted to revisit and revise those terms to be more explicit, but it is not an uncommon practice for any compensation to be limited to the original value, and require the difference to the current pricing to be made up by the customer. FCP Euro has just changed their "Lifetime" policy to reflect just such a change.
It is incumbent upon customer to read, and understand the fine print, especially with regard to lengthier warranties, but realistically, that doesn't happen, and when ambiguities exist, the lawyers will pounce, and those who bother to participate in the class will get their paltry settlement…eventually.
Sort of. The demands of leaving ignition in accessory position are significantly higher with various modules for transmission, awd, stability control, engine along with navgiation, satellite radio, 10-20 interior lights, heated seats and screens across vehicle vs a 1995 Honda .
As well as stop/start systems. Some OEMs may choose to underspec their batteries (hello, Honda) to save weight, or charging strategies to eek out more fuel economy, but the electrical demands of a modern ICE vehicle eclipse those of the past.
Even a basic "economy" car like a Corolla has a 100A alternator, and a luxoboat commonly carries a 200A+ alternator, along with a boat anchor of a battery, with more modern chemistry to meet the higher demands. Not gonna get away with a 60A alternator in a new car like in the past.