Features built-in safety timer to avoid overcharging batteries. Trickle charge technology keeps batteries at full capacity. Charges eight AA, AAA, four C or D or one 9V batteries. Recharges either NiMH or NiCad batteries in three to seven hours. Contacts auto-adjust. Includes convenient LCD charge-status indicator. Battery Type: NiCd; NiMH; Battery Size: 9V; AA; AAA; C; D; Charge Time: 3 to 7 hrs.