NSKI Replacement Rechargeable Battery 1500mAh Li-ion Battery Pack for BF-888S/ BF-777S/ BF-666S/ H777 Handheld Two Way Radio Walkie Talkies. Replacement 1500mAh rechargeable battery for baofeng bf-888s bf-777s bf-666s two way radio Capacity: 1500mAh Type: Li-ion Color: Black Voltage: DC 3.7V