Like wine these should get better with time. See below, the LSD should discharge slower as you use them.
http://en.wikipedia.org/wiki/L...discharge_NiMH_battery
Sanyo Eneloop
See also: Eneloop bike
Sanyo's Eneloop batteries are one brand of low self-discharge NiMH battery, rated at capacities of 800 mAh for AAA, 2000 mAh for AA, 3000 mAh for C, and 5700 mAh for D batteries (C and D sizes announced August 2008).[15]
A Sanyo official has stated:[5]
* "The Eneloop batteries are sold charged, but not necessarily 100% fully charged. In Europe we charge them about 75%."
* "Several long term tests have shown that the self-discharge rate decreases over time. This means that Eneloop batteries discharge relatively fast at the beginning and relatively slower the longer you store them."
* "Higher temperatures substantially increase self-discharging. It is best to store Eneloops as cool as possible to keep the charge in the battery. As a rule-of-thumb, every 10 °C increase in storage temperature is equivalent to doubling the discharge rate."
* "The chemical decomposition of the cathode has been reduced substantially by the use of a new super lattice alloy."
Storage temperature does not explain why some in the same package have lower amount of charge. But if they are "charged" after production may explain why some were dead If some were cycled to fast.
http://en.wikipedia.org/wiki/L...discharge_NiMH_battery
Sanyo Eneloop
See also: Eneloop bike
Sanyo's Eneloop batteries are one brand of low self-discharge NiMH battery, rated at capacities of 800 mAh for AAA, 2000 mAh for AA, 3000 mAh for C, and 5700 mAh for D batteries (C and D sizes announced August 2008).[15]
A Sanyo official has stated:[5]
* "The Eneloop batteries are sold charged, but not necessarily 100% fully charged. In Europe we charge them about 75%."
* "Several long term tests have shown that the self-discharge rate decreases over time. This means that Eneloop batteries discharge relatively fast at the beginning and relatively slower the longer you store them."
* "Higher temperatures substantially increase self-discharging. It is best to store Eneloops as cool as possible to keep the charge in the battery. As a rule-of-thumb, every 10 °C increase in storage temperature is equivalent to doubling the discharge rate."
* "The chemical decomposition of the cathode has been reduced substantially by the use of a new super lattice alloy."
Storage temperature does not explain why some in the same package have lower amount of charge. But if they are "charged" after production may explain why some were dead If some were cycled to fast.
