What? I don't think that anyone is making any claims that are not true. I personally am reporting exactly what I have experienced which is all that I can do. I was skeptical at first about using a flashlight. But there were so many good claims that I tried it and was amazed to find the claims were not exaggerated at all!

Anybody that knows anything about batteries knows that Nimh battery performance goes down with the temperature and that an Li-ion battery is a better choice for cold temperatures.

I have experienced runtimes on several occasions of 2 hours in 30 degree Fahrenheit conditions which is equivalent to -1 degree Celcius. This was Duracell 2650 Nimh on their initial cycles. The flashlight was mounted on my helmet.

There could be a couple of reasons for his experience. First, if the batteries are older perhaps he has not maintained them properly. If he had an advanced charger he could test their capacity. Second, he may have a lowered capacity battery paired with a still normal capacity battery. The runtime will only be as long as the weaker battery. Again, he would either need to refresh the weak battery or replace it. The one time that I personally experienced a shorter runtime was found to be this exact cause after analysis of the batteries.

He also did not say how he initially charged the new batteries. New Nimh's need to be trickle charged for 24 hours for maximum initial performance. They can take several cycles to reach near maximum capacity. Although Energizers overall seem to be okay, I have seen enough negatives that I just don't buy them. Sanyo, Duracell, Rayovac, and Powerex consistently perform better than their claimed capacity and the competition in all the tests that I have reviewed.

Batteryuniversity.com is a great educational resource for understanding batteries and has enlightened me very much. It is at the top of my suggested reading list for anyone desiring more, accurate knowledge about batteries. There are also numerous sources of independent battery tests if you look for them.