Old thread but this is why these days for anything I consider valuable I either use eneloop rechargeable batteries or Energizer lithiums. I've never had either leak in probably 20 years and hundreds of them.
Meanwhile the last 5-10 years or so, I've had
every major "premium" brand of alkaline batteries leak, duracell, rayovak, energizer, kirkland, etc. Some of them while still in the original packaging. Used to buy tons of Rayovak batteries during home depot's black friday sales, but the last few years both they and duracell have leaked repeatedly. It's too bad Costco stopped carrying eneloop cells, they were quite cheap there.
Anything I use frequently I use eneloops in, anything that's infrequent use but needs to work, I either keep the batteries out of it, or use Energizer lithiums.
I need to follow my own advice better! For giggles I checked some devices around the house, mostly flashlights cheaper stuff etc. I bet half of them had leaking batteries for those that didn't have lithiums or eneloops in. Mix of duracell, kirkland, energizer.
Normally this time of year battery junction has good battery sales for black friday and I stock up. Sadly the good old days of getting energizer lithiums on sale for under $1 are long gone. I use them a lot for coin cells too, don't buy them from Amazon, they are rampant with counterfeit batteries in the 2016/2032 sizes etc.
The battery leak warranty is interesting, I've never really checked into that. Considering all of them tend to leak it seems it probably pays to go with the brand that offers the most leak protection in case of equipment damage.
Just poking around a bit it seems like Duracell is not the way to go.
- I could not find an official duracell link but other sites had it posted that Duracell would repair/replace an item in 2-5 years from battery purchase, but you had to have the sales receipt.
- Rayovak seems like they will repair or replace the damaged device with a replacement, or one of equal market value as long as the batteries have not expired. No mention of a receipt needed. This might be the most flexible since it sounds like newer Rayovak's have 10 year expiration dates.
- Energizer seems like they will repair or replace the batteries and device like Rayovak but their wording is "within the full life of the battery I assume this is expiration date), or within 2 years of the full use of the battery. Again no mention of a sales receipt. Also as an aside Energizer bought Rayovak back around 2019.
- Not sure about kirkland, couldn't find any official policy but a couple folks posted that they returned the device and batteries to costco and were reimbursed for the product.
The other thing that's interesting and maybe I just can't remember, but typically I go through more AAA's than AA's and I don't know if I ever remember having a AAA or 9v leak, it's almost always AA's. Not sure if it's current drain, construction etc.