The Panasonic Eneloop AA NiMH 1900mAh pack of 4 with the battery box are the same Eneloop technology but now branded by Panasonic with the added bonus of a handy battery case to put them in. Now in their 4th generation of the Eneloop brand they still offer the same great performance of up to 2100 charge cycles, good battery power retention and are very low self discharge. This means that these batteries will go longer between charges. These Panasonic Eneloop come pre-charged so are ready to use from the pack. If you are not ready to use them you can still leave them and they will retain 85% of their charge after 1 year and up to 70% of their power after 5 years. Ideal for camera flash guns, digital cameras, remote controlled cars and wireless devices.