While this is not a scientific observation, my experience has been that they exceed the performance of non-rechargeable AA or AAA batteries.

great performance

We all need batteries, but if you want THE battery that will give you the best performance and long-term cost effectiveness, then this eneloop 4th generation 2100 is THE battery you want

In general, I am not a fan of rechargeable batteries, as most brands produce erratic performance and won't hold a charge for very long.

Unless otherwise noted as being capable of charging different chemistries and/or different voltages, NiMH chargers should not be used to charge batteries of other chemistries (such as NiCad, LiFePO4, or LiMn, for example.)I have found that a good-quality charger plays a big role in getting the best performance and your money's worth with rechargeable batteries, plus it gives an added safety factor

These fourth generation eneloop 2100 batteries give performance that not only exceeds all other NiMH cells, but exceeds disposable alkaline cells as well

As eneloops are not the cheapest NiMH batteries, a good charger will ensure you get the best performance and maximum useful service life from your investment

They last for years and years, provide reliable and consistent performance, and I have yet to have any device they are powering quit prematurely.

Despite being suitable for these very low drain applications, these deliver equally impressive performance with high-drain applications, such as usage in a high-output flashlight

I have had these for almost a year and they still work the same as they did when new.

The eneloop Pro is designed only for usage with extremely high-drain devices, and with normal and low-drain devices, it will not perform nearly as well as the eneloop 2100

Great as always