ChrisGarrett
Flashlight Enthusiast
That has not been my experience with the hi cap cells with regard to lasting 2-3 years. I have Eneloop XX's from 2011-2 that I use often and still work fine, didn't keep track of the charge cycles but I am guessing I have over 200. I also have a bunch of Ion Cores form when they first came out in 2013 or so and some 3 + year old Energizer Recharge plus cells - again all still work fine after a good amount of use.
I think that most problems with short life of Eneloops and Eneloop rebrands are caused by crappy chargers that are dumb that never shut off or only shut off after 12-16 hrs, cooking the cells or by marginally less chappy "smart chargers" that charge only cells in pairs that typically overcharge half of the cells being charged. A decent smart charger that charges individual cells, like the basic Eneloop BC-17, will charge all of the cells properly. Another type of charger that kills cells are the super quick 15 min - 1 hour types.
I guess you would be the exception to my experiences reading here for 6+ years and my own time with various NiMH batteries.
Check their I.R.s on an analyzing charger and see what you see? They might work in lower drain devices, but I'm sure, even positive that their I.R.s are much higher than when new.
I've used analyzing chargers since before I joined this forum and I've had/have lots of different types/brands, so I have a good sample size.
Now, the 'made in Japan' silver foil Energizer 2300mAh AAs and even their 850mAh AAAs have stood the test of time for me, despite others having so-so luck with them.
I just ran 4 2300s through the break-in on my Maha--dated 7/10 and they were all in the 2025-2075mAh range with I.R.s in the 1.60v range, so pretty good after 8 years.
Chris