I started using rechargeable batteries in everything that doesn't get lost or goes hiding (such as kids toys) for a very long time. Wireless keyboards and mice, remote controls, flash lights, cameras, RC remote, etc. My preferred ones were Powerex (always bought on sale from Canada Computers) for high current applications such as flash lights, and Eneloop for low discharge such as remote controls and wireless mice. One annoying thing about Powerex is that any drop or shock, would increase the self discharge current ten folds. Maybe being high capacity, the separator is very thin and it gets damaged by shock.
Once I discovered Ikea Ladda, I was super happy with them and I started replacing Powerex ones everywhere. Eneloops still go strong in all the devices I put them but I don't buy new anymore.
I jut bought two sets of the new Ikea Ladda model (green-ish with white text) and they seem to be the same product as the old ones (white with black text). The price is $8.99 CAD, plus 13% HST is $10.16, that makes it $2.54 a piece. Not bad at all!
They have the same weight, size, perfectly identical voltage out of the box, etc. I expect to have the same low self discharge but that's TBD.
I can see the package being cheaper, they are packed in paper rather than in plastic blisters, but I don't know why they changed the colors, maybe it's just a commercial gimmick.