The Eneloop cells are some of the newest cells available. They perform very well up to 4C and their low self discharge rate is a big plus. The consistency between cells is amazing.

There are a lot of these cells in various services and they seem to perform well. Very few have been pushed to failure, but failure seems to involve over discharge and extended trickle charging. The are also damaged by excessive heat.

There are other brands of low self discharge cells, but the Eneloop cells remain the flagship of this chemistry.

They are very good in cameras because they hold a higher voltage under load than normal NiMh cells.

Tom