1.2V 2000m Ah Eneloop AA Ni-MH Cell (O-EN-2000AA) superb charge retention – 90% after 6 months, & 85% even after a year, so no need for regular charging to aviod permanent capacity loss required by many Ni-Mh cells Due to this the cell can be used immediately after purchase, & do not need charging first! Much higher voltage under load, the voltage does not collapse when high currents are pulled, which is an unwelcome characteristic of normal AA Ni-Mh cells. Over double the cycle life of most Ni-Mh cells, over 1, 000 cycles are possible!