I recently purchased 3 sets of AA Energizer brand rechargables. They kept their charge in some of my electronics for all of 24 hours in many cases.
They seem like a great idea, but in my recent (last 2 years) experiment, the performance actually does degrade that quickly. It could have just been a bad batch, but it was 3 separate 4 packs of battteries, all with their own chargers.
If it was the chargers that were packaged together with the batteries, then the problem was likely the charger destroying the batteries rather than any fault of the battery itself.
