Eneloop doesn't make D's and I have to have many Ds, so went with the same new technology Tenergy Ds with the same low self-discharge of the Eneloops.
I don't think about the money these took to buy because they mean living well or barely living if I don't have them.
Eneloop makes D and C batteries but we don’t see them in America, just as we won’t see the generation 4s for a couple of years when they come out, although Japan will have them.
I believe in using AA and AA batteries anyway and having D and C adapters (they hold AA batteries) for emergency use, UNLESS you have money, and then owning and using D batteries is cool indeed because some luxury items like very bright lanterns, use a lot of D batteries, as long as you also put out the money for for the greater charging needs.
A D battery can be 10,000MaH and would never charge on a small solar charger that can handle 2000MaH AAs, and 800MaH AAAs.
The AA is the most common battery on earth, and the AAA is second, so most of my survival gear and flashlights use the AA for power.
Smokin Joe, the Eneloops are LSD (low self discharge), meaning they can sit in the drawer for many years in between charges and still operate at 4 degrees below zero.
“eneloop (3rd generation)
In October 2011 the batteries were again improved to hold their charge for up to 90% after one year, 80% after 3 years and 70% after five years. In addition to the lower self-discharge rate, the batteries can be recharged up to 1800 times compared to 1500 times in the previous revision”