Charges one to four AA or AAA size NiMH batteries in 15 minutes for maximum convenience. Individually monitors cell condition and terminates charging current when charged. Includes Trickle Charge, low rate charge to retain charge level that would otherwise be lost due to self-discharge and storage. Illuminated LED monitoring light keeps you aware of charge status. Battery Type: NiCad; NiMH; Rechargeable; Battery Size: AA; AAA; Battery Capacity: 2,650 MA-h; Charge Time: 15 to 19 minutes.