This is the 4th generation of Eneloop rechargeable batteries (BK-3MCEE) with up to 2100 charge cycles. They loose only 10% of their capacity after 1 year and and they still hold up to 70% after 5 years.
Panasonic Eneloop Batteries are the latest in rechargeable battery technology from the company that is
generally regarded as leading the world in this field.
It is well known that high quality NiMH rechargeable batteries outperform disposable ones (including
even the very best alkaline batteries) in power hungry gadgets such as digital cameras, but there were
2 areas where they had problems.....
1.) They had to be charged before first use.
2.) Once charged they would run down without even being put in anything, typically losing around 25%
of the stored energy per month. Not really a problem when you are charging them frequently, but for low
power or occasional uses this could become inconvenient.
Eneloop batteries have solved these problems.
The batteries are supplied charged, so just use them straight after purchase
The batteries discharge at a much slower rate than conventional NiMH batteries, losing only about 10
% of the stored energy after 12 months & even a 5 years after being charged there is still 70% of the initial
charge still available. So you get all the benefits of traditional NiMH rechargeable batteries, without the
drawbacks - and you can still use a standard NiMH charger to charge them up again (maximum
charge current 2000mA)
Detailed Technical Specifications: