It seems like you're asking about a B-K8 mobile phone battery with a capacity of 4350mAh and a voltage of 3.87V, possibly for a Vivo phone. Is there something specific you'd like to know about this battery, such as compatibility, suppliers, or specifications? Let me know how I can assist!
Longhehui supplies replacement batteries for phones, tablets, smartwatches and laptops, with wholesale, OEM and ODM enquiries welcome. Request certificates, test reports and transport documents for the exact battery model and destination. Product certification and quality-management certification have different scopes; verify the issuer, certificate holder, covered models and current validity before ordering.