Retevis 2 Way Radio Replacement Li-ion Battery 1000mAh Compatible Baofeng 777S/888S Retevis H-777 Walkie Talkies (1 Pack) Portable Power; type Li-ion battery; Voltage 3.7V; Capacity 1000mAh Long Lasting and ; Just need to charging 3-4 hours and it can last for 6-8 hours using Suitable for Baofeng Retivies Walkie Talkies; Perfect replace your original batteries of BF-888S BF-777S BF-666S Retevis H777 High capacity; Capacity 1000mAh that's enough power for days usage Worry Free Warranty; We offer 60 days warranty and 30 days no reason to return service with our friendly and profession customer service team