Guaranteed brand new product when purchased from Amazon.com (ships and sold by amazon.com)</br>Battery Specs. Capacity: 1500mAh. Battery type: Lithium Ion?? Voltage: 3.7V Li-ion.</br>It is recommended to fully drain and fully charge the battery especially during the first 3 charging and discharging cycles?? doing so may greatly improve the overall life of the battery</br></br>Product Description</br></br>Keep your Samsung phone powered and always ready to use