NiZn batteries is excellent!

This lot had been recommended to me by a relative. A priori, this is the time that will confirm it, but it seems that NiZn batteries crush everything that has been proposed so far. The increase in tension there is probably not for nothing, however holding the load is much better than NiMH and NiCd alone. Therefore recommend without reservation.
The only downside is that it is necessary a special charger.