The guy is a tool, I agree chances are for most peoples uses, a lighter lower capacity D cell is a better idea, most people that use rechargeable expect to charge them often enough, or they will learn to with high self discharge, no matter the size of the cell it will die if it's rechargeable, smaller cells faster charges.
The linked article is BS propaganda that plays on anti-capitalist bias to steer people towards the author's own website selling -- you guessed it, "true" D-size rechargeables.
What is real is that Energizer does indeed sells rechargeable AA's in spacers for C and D-size applications. But the rest of it is bunk, in particular the paranoid conspiracy theory that Energizer's motive is to make rechargeables look bad so that consumers will stick to the disposable alkalines. What rot :thumbsdow If that were really the case, we'd see 500mAh AA's that are really AAA's inside spacers, and so on.
The truth is more likely that AA cells outsell C and D by some huge ratio per-cell, so the latter market is a lot smaller -- we don't see very many "true" C and D-size rechargeables industry-wide, let alone from just Energizer.
Being a consumer-oriented mass market company, they figured that market segment was too small to warrant doing the R&D to develop true C and D cells on their own, and AFAIK their partners (like Sanyo) believe similarly, as they also lack true C and D cells. So, they simply decided to take the cheap route, and rely on their name to sell an otherwise inferior product in a market segment they barely care about. They certainly do see a lot of profit per unit, but I doubt they sell enough for it to make much of a bottom-line difference. They could skip C's and D's entirely and hardly notice.
Next up is his claim that the Energizer D's are selling them for $25 a pack. Where? No link. How could a reporter writing for a website that trumpets its credibility ("What makes us different? Read our Declaration of Journalistic Independence.") fail to do something as simply as check online? Amazon has the D's in a 3 pack of 2 (6 cells total) at list price of $27.04; that's about $4.50 each. Fry's has them at $5 each ($9.99 for the 2-pack).
http://www.amazon.com/dp/B000HLY7GU/?tag=cpf0b6-20
http://shop2.outpost.com/search;jsessionid=lCBHW9PczP-RmoA2mRszLg**.node2?cat=-45378&pType=pDisplay
It's not until later that we find out what he's up to -- the site with the Powerex D's that he keeps pimping, is his own:
"Want to buy an honest "D" battery? Check out Powerex. These are the best rechargeable batteries I could find. Click here to learn more. I liked them so much that I bought several hundred of them and decided to offer them through my company, --omitted--.com".
Can you say "conflict of interest"?
I say, by all means look for true "C" and "D" cells, including the Powerex. Just don't buy them from this fraudmeister. It might be a good idea to treat everything on that Web site with a healthy does of skepticism too, now that we know what "journalistic independence" really means there.
C and D rechargeable cells are more difficult to manufacture than smaller cells, due to the nature of the NiMH spiral-wound design.
Could you elaborate or point to an article that describes the problems. I am really ignorant of this issue.
Sub-C cells are mass produced and use for all sorts of power equipment. Older tools used NiCd and some newer use NiMH. I just rebuilt my Roomba robot pack, 12x sub-Cs. The original cells were 3 Ah and I upgraded to 4 Ah. These NiMH cells worked under heavy load, as robot's different components and sensors end up pulling a lot of juice. The pack still lasted for 200-300 cycles at which point it was down to about 60% of original capacity.
Now if such solid robust sub-Cs are available at 3 Ah and more, why can't Energizer use them for their C/D cells? I would expect sub-C to be easily 50% higher capacity than AAs. Yet Energizer C/Ds are the exact same capacity as AAs. How come?
Again, they are being very cheap, yet still charging average prices.
That is possible. Still he has a good point.
It is no secret that Energizer DOES develop fragile AA cells that have shorter lifespan and tend to fail often for any reason.
However, is C/D market so small???? Then why are so many C/D alkies sold in every store? They are not that hard to find.
This makes no sense. What R&D????? It is the exact same design, just different dimensions.
The basic claim that these C/D packaged AAs are costing at least 2x more is true. I bought some so I know. You can generally get a package of 2 Ds for about the same price as 4 AAs. Cs are not much cheaper either. So his basic claim that you are paying more for AAs is correct.
It comes down to how much you want to trust ANY company, especially a big one like Energizer. How much did you trust Andersen Consulting or Enron, etc.? How much do you trust mortgage brokers today?
His promotion of Maha could be a conflict of interest. However, he is doing us a service by pointing that there are alternatives which are not offered in most stores.
I think it is natural that most consumers would expect that the larger batteries will naturally store more power. And also natural to expect that many of them aren't savvy enough to be comparing mAH ratings and probably largely purchasing on availability and brand-name. In that light I think you can make an argument that Energizer is being deceptive in practice, whether or not it is intentional.
Let's compare prices for high capacity NiMh batteries. One web site offers AA for $1.60 and D for $8.00 each. That's four AA for $6.40 (about 33% below discounted retail prices of "$9.60").
My applications seem to use small numbers of AA batteries. A package of Eveready 4AA NiMh batteries and charger is $25-30 or so.
However, my most demanding application (boom box) uses six D batteries. So, that would be $48 (six times $8.00 each), plus a compensation for being 33% below retail... That's $72 for my rechargeables plus another $20 to $30 for a cheap charger (that only chargers 2 or maybe 4 batteries at a time). We're talking about $100 here. My boom box cost $50...
Needless to say, most people will forgo the $100 "savings" offered by the rechargeables and buy 11 sets of D alkalines for that $100 (66 batteries at $1.50 each) each year.
Let's call for government truth in advertising standards! Such as...
A food product can be labeled as having "0 grams of transfat" in the package if it contains less than 0.5 grams of transfat per serving. A container of candy could have 32 grams (more than one ounce) of transfat if a serving is one-half ounce!
I just find the entire situation ridiculous. Given all you said about low volume and the need to pay for R&D with higher proces on low volume C/D cells, then why are electronics designed to use C/D cells as opposed to smaller/cheaper AAs????? After all the use less space, so you'd think it would be easier to design smaller battery compartments for AAs.
As it is now, we have devices like many toys designed for C/D sizes thinking that they'll last longer (higher capacity) only to discover that it is cheaper to make AAs in C/D shells which in fact DO NOT have a higher capacity despite bigger size, which in turn forces us to seek reusable C/D spacers/shells to stuff our standard/cheaper AA's into.
All these stupid games and deception just to end up back where we started from, the good old mass produced AAs. Seems like a lot of wasted effort to no purpose?!?!?!