Eneloop batteries have a low self-discharge rate and come pre-charged. Not only are they ready to use immediately after purchase - they also retain their charge over a long period of time. This means that after one year of storage, 85% of the capacity is still present. This means your device is always ready for use and guarantees that the energy you need is always available when you need it. One of the most important requirements of a rechargeable battery is its service life, i.e. the number of charge / discharge cycles that a battery can withstand without losing power. Clearly, the biggest advantage of the eneloop is that it can be recharged up to 2100 times and then recycled. In the long run, this is not only cheaper, but also environmentally friendly.