But that doesn't give them a license to sell junk.
My original GM issue Delco battery lasted 7 years.
The replacement Delco lasted 5 years.
This replacement Delco a hair over 3 years. Something is wrong there.
Battery technology has not improved or changed much over the past 60 almost 70 yrs. Other than an AGM (Absorbed Glass Material) and a
VERY limited availability of actual Gel Batteries, not AGM, the standard Lead acid plate battery is the same now as it was when your Dad, Grandpa or Great Grandpa bought a battery back in the 30's, 40's or 50's!
Even Optima batteries are lead acid, the only different being they are spiral wound instead of straight/flat plates.
The issue is that vehicles have far surpassed the technology of todays battery and the battery manufacturers haven't kept up. Now don't jump on here and say "Well my Tesla battery ............." stop right there!! That is a Lithium Ion Battery that is controlled (massively) electronically and not a Lead Acid battery!
Today's Vehicles are so much more reliant on a power source than what they use to be. The PCM or ECM, Satellite Radio, on board cameras, parking sensors, TPMS, HID or LED bulbs, electric seats-heated and cooled, audio and video screens-amps-sub woofers, electronic transmission shifting, ABS, sun roofs, rear hatch lifts, electric mirrors heated/cooled/folding/lighted, etc....... The power demand has increased 500% I'm guessing although my numbers may be a bit off!
Typically the battery warranty is just about what you get out of it, give or take a few months. If your lucky enough to have a 3yr battery that lasted 5yrs, then lucky you!
From the research I've done their is one battery that I have read Post's about that repeatably brag about the longevity of a particular brand. But I think testimonies that I've read are subjective at the very least. Different operating conditions-climate play a key factor in the life of a battery.
I work Full Time for an Airline and I've been turning wrenches for over 40 yrs, aircraft have standby batteries for emergency essential bus items. The engines don't have a battery like vehicles do because they have their own generators. So the gear box (via a radial drive shaft) keeps a Constant Speed generator running smoothly and efficiently supplying all the power that the engine and aircraft need. When the AC is on the ground it uses an APU for a power supply, which does use a battery to start it!
I've said too much but I think you get my point. Car batteries will last 1-2-3 yrs as their warranties imply, any length past those posted warranty dates is a WIN and should be celebrated!
Cheers!
Chad