Advantage: Overcharge and overdischarge protection to increase the life of the battery. No memory effect, can be charged or discharged as needed without loss of capacity. Low self-discharge for maximum productivity and less downtime. Specifications: Voltage: 8V Capacity: 4000mAh Battery Type: Lithium-Ion Replacement Part: Dewalt DCB080 Compatible Models: Dewalt DCF680N1, DW4390, DCF680N2, DCF680G2, DCL023 Announcements: Before recharging the batteries, please make sure that the batteries have already cooled down. For safe transportation, the batteries have not been full charged, after three cycles (full charge and full discharge for three times), the batteries can reach the best condition.