Easy to use! AP8863 recharges up to four AA or AAA rechargeable nickel metal hydride or rechargeable alkaline batteries at one time; AP8667 recharges up to eight assorted AAA, AA, C, or D batteries. Normal charging time is 3-5 hours for AA or AAA batteries; overnight for C and D batteries. Electrical input: 120 V AC. Cord length: 6 feet. UL approved.