Gold Phoenix&reg; NEW High Performance Laptop Battery for Toshiba PA3817U-1BRS PA3819U-1BRS Gold Phoenix laptop battery for Toshiba PA3817U-1BRS PA3819-1BRS Rechargeable Battery Specifications--Chemisty: Li-ion, Storage Capacity: 4400 mAh/48 Wh, Voltage: 10.8 volts Fast shipping from USA. Brand new replacement battery, works as genuine parts. in order to Maximize the battery life,Please read the instruction manual before using.