PANASONIC K-KJS1MCA2BA ENELOOP D SIZE BATTERY ADAPTERS WITH ENELOOP AA 2100 CYCLE NI- MH PRE-CHARGED RECHARGEABLE BATTERIES, 2 PACK WITH 2 "D" ADAPTERSPackage includes two eneloop "D" Size Spacers and two eneloop AA batteries. eneloop "C" and "D" size spacers allow for eneloop AA batteries to be inserted and utilized in "C" and "D" size battery applications. The battery cells maintain their original eneloop AA cell performance characteristics including 2000mAh typical (1900 minimum), up to 2100 recharges, and will hold 70% of their charge for up to 10 years, (when not in use). These adapters are a great alternative when "C" and "D" size batteries are not available. Battery life will vary based on the application.*Recharge up to 2100 times*Maintain up to 70% of their charge after 10 years (when not it use)*2000mAh type, 1900mAh min, Ni-MH pre-charged rechargeable battery*D size spacers allow eneloop AA batteries to be used as D cell batteries*No memory effect - batteries can be recharged when fully, or partially discharged