Panasonic K-KJ55MC84CZ eneloop Power Pack; 8AA, 4AAA, and Advanced Battery 3 Hour Quick ChargerIncludes 8 AA and 4 AAA eneloop batteries (up to 2100 cycles) and Panasonic four battery, 3 hour (bq-cc55) quick charger. eneloop Ni-MH "low Self discharge" Batteries utilize Panasonic advanced rechargeable battery technology, allowing them to be recharged up to 2, 100 times. eneloop batteries deliver consistent power performance, maintain 70% of their charge for up to 10 years (when not in use), come pre-charged by solar power (at the factory) and are ready to use out of the package. They also have extreme temperature performance down to -4 deg F. Panasonic BK-3MCCA16FA eneloop AA 2100 Cycle Ni-MH Pre-Charged Rechargeable Batteries, (package includes 16AA blue or 16AA white)p>eneloop NiMH "Low Self Discharge" batteries utilize Panasonic advanced rechargeable battery technology, allowing them to be recharged up to 2,100 times. eneloop batteries deliver consistent power performance, maintain 70% of their charge for up to 10 years, come pre-charged by solar power (at the factory) and are ready to use out of the package. They also have extreme temperature performance down to -4 deg F.