Are the Ikea Ladda 1900mAh cells any good after a couple of years?

I've run a pile of the 1900s for about four years now, mostly in garden lights, door sensors, and a couple of clocks. The ones in daily cycle duty like yours are the real test, and here's what I saw: the first year they all seem identical, then around the two year mark the cells in the shadiest spots start falling behind. By year three I had maybe a third of the daily-cycled ones noticeably weak, but the rest were still fine. So your expirience after one year matches mine exactly. If you cycle them every day or two, expect the weaker cells to show up sooner than the two to three hundred full cycles you'd hope for on paper, because partial top-ups in poor sun and sitting half-charged overnight are harder on them than a proper full charge and discharge.

On the charger thing, yeah, upgrade it. Those timed ones just blast a fixed current and stop, so they either undercharge or cook the cells a bit every time. I grabbed a basic smart charger that charges each cell individually and stops when it's full, and my batteries last way longer since. Bonus is you can spot the weak ones early, because the charger finishes them fast or refuses to hold them at full. As for the Eneloop thing, I reckon there's somthing to it, the country of origin on the wrapper matches, but nobody's ever proven it either way. Cheapest test is just to cycle a pair hard for a few months and see how they compare.

Still new here so no long term data from me, but I did buy a batch of the 2450 size last year for my bike light and a wireless mouse, and out of twelve cells two came out of the pack noticeably weaker. Never fully died, just don't last as long between charges. Now I sort them into two little boxes based on wich ones test weaker and only pair the good ones togehter in anything that runs two cells. Does anyone actually mark thier cells somehow to keep track of which ones are the dodgy ones? I've just been using a paint pen dot but I'm curious if there's a better system.

Kind of in the same boat, I use mine in doorbell toys and a little radio, nothing that drains them hard. The ones in the sunny spots still feel strong after a year but I have no way to actually measure how much life is left in them. Is there a cheap gadget that just tells you how full a battery is when you stick it in? I keep seeing people talk about testing cells but I don't know what to look for. Also wondering if the tired ones from my garden lights can be shuffled over to the clock and remote jobs, or once they go weak are they basically done for good?

Agree with the charger advice, swapping mine out made a real difference here too. The timed one I had would get the cells warm by the end of a charge, and you could feel it. Once I switched to one that charges each slot separately and shuts off per cell, the Laddas stopped coming out hot and they just seem to hold charge better between uses. Mine also shows the voltage on the little screen when a cell goes in, which is how I found one that was sitting lower than the rest after a full charge. That one now lives in a clock instead of the path lights.

Update: took the charger advice and swapped the old timer one for a basic smart charger that does each cell on its own. Night and day, they come off charge properly full now instead of guessing. Also pulled the two shady-spot cells and sorted them into a weaker pile like the bike light guy did. For checking what's left in a cell, a cheap tester that shows the voltage was all I needed.