Sanyo’s Eneloop batteries differ from ordinary NiMH rechargeable batteries by featuring a very slow self-discharge rate. In fact, Eneloops are shipped fully charged and ready to go. I’ve already switched over to using Eneloops over other rechargeable battery brands, and even use them in place of alkalines in many applications.
Eneloops and other slow self-discharge batteries are said to combine the benefits of both Alkaline and rechargeable batteries by offering high performance and a stable shelf life in a rechargeable package. They also seem to perform better than either technologies at lower temperatures.
Eneloops cost about $2.50 each, which is about the same as other rechargeables go for. The capacity is 2000 mAh.
A few weeks ago we talked a bit about Fenix’s LD20 LED flashlight. This flashlight requires AA batteries, but I’ve found that alkaline, even high performance ones, aren’t up to the task. Sanyo Eneloops, on the other hand, power the flashlight with ease and consistently. With alkalines, the flashlight’s output would pulse at peak intensity when first turned on, and then drop down a bit. With Eneloops, the output was consistent at maximum output (unless of course when dialed down).