That is absolutely incorrect.
They have three AA batteries in each D smart shell vs a D battery. If I just use Energizer specs that is 3 X 2300mAH for each Smart Shell vs 2500mAH for each Energizer D battery. ... ...
You have to be kidding.
... ... ...
And you are incorrect. An Energizer D cell has 12000mAh capacity at 250mA. More for lower currents
http://data.energizer.com/pdfs/e95.pdf
An Energizer Alkaline D cell at 500mA discharge is around 9000mA hours. At 600mA for 2 hours a day, you can get 15 hours of life. That also equates to about 9000mAH. So it stores more energy then 3xAA cells easily. Also you can get NiMH D cells around the 10,000mAH. Where did you get the 2500mAH number for D cells from?
http://data.energizer.com/pdfs/e95.pdf
An Energizer AA cell at 500mA/3 = 166mA has a capacity of about 2000mAH, so three of them equate to 6000mAH.
http://data.energizer.com/pdfs/e91.pdf
These are numbers that make far more sense to me - and the data sheets just confirm my understanding.
So the run time with their Smart Shells has to be longer. Probably around two times longer run time even with boost. Yes/No?
Ahhhh ...
No.
I find the argument fundamentally incredible - as in - unbelievable, lacking in logic, failing in fact.
Just think for a microsecond ... why do they make 'D' cells? Aside from greater peak current capacity, it's because they have greater energy capacity, which comes from the
volume of the chemistry inside. Considering the type of chemistry is the same, it can be said pretty conclusively that 3 smaller cylinders of that chemistry that fit in the space of one larger cylinder must ALWAYS have less capacity than the larger cylinder, because the air in between isn't providing any power.
But, then this is Batteroo we're talking about, so perhaps I am missing something where some fundamentals of physics and chemistry can be overruled.