Did decent battery prices nearly double in the last 4 years?
Battery prices have gone up and the warranties were slashed.
I live in Vegas and batteries live about 3-4 years max due to the summer heat beating them up, even though my Bird is garaged at home.
It's so consistently 3-4 years of life, that I even have an Outlook Reminder set to let me know when a new battery is 3 years old, so that I can expect it to die soon.
I also meticulously maintain my Bird and regularly inspect & clean the battery terminals of any corrosion, then spray the red stuff on them.
In previous years, I always bought Autozone Duralast Gold batteries because they had 3-year/36K mile free replacement, then pro-rated after that period. But in the last few years, every brand of battery has had the warranties reduced to just a flat-out 3-year free replacement warranty and that's all. One day over warranty and you have to buy a new battery. Lesser/cheaper batteries will have a 1-2 year or less warranty.
Last November, my last Duralast Gold battery died. A new one would have cost $210. F that noise.
Walmart EverStart Maxx was only $140 with same 3-year/36K mile free replacement warranty, so went with them because they also have great ratings/reviews.
Here's a pro-tip to note:
Normally, Duralast Gold batteries only lasted 3 years in my Bird, due to the summer heat. But with my last Gold battery, at around 3 years of age, I started charging/desulphating the battery monthly with a Harbor Freight Viking Battery Charger/Maintainer that also desulphates them. Doing that, I was able to get 5.5 years out of the battery before it died. Probably would have gotten more years out of it if I did that starting when the battery was new.
The new EverStart Maxx battery, I do the same charge/desulphate procedure every month since it was new. I'm curious how many years I'll be able to get out of it.