In reply to The Lemming:
> Seems like the reputable brands are much of a muchness in performance.
I think you're right. Without having previously done any research - or read any review - for some time now I've been using AA Energizer rechargeables in my modular LED caving lamp. Mainly using the flood module rather than the spot module, so a constantly regulated current drain. Subjectively they seem to last as long as the equivalent Duracells that I've used - and they're readily available in shops when they need replacing. (They're a couple of quid cheaper to buy on-line, but I never bother.) Panasonic Eneloops are significantly more expensive, so I've not bothered with those, which is just as well having now read your linked review. Currently I'm using the Energizer 2000 mAh NiMH Power Plus version rather than the slightly more expensive 2300 mAh Extreme version. I can't comment as to whether or not the Energizer AAAs are as good.
I think a good quality smart charger is also needed to get the best out of any rechargeables, irrespective of brand.
Post edited at 12:42