Manufacturer: eReplacements, LLC Manufacturer Part Number: 42T4751-ER Manufacturer Website Address: Brand Name: eReplacements Product Model: 42T4751-ER Product Name: 42T4751-ER Notebook Battery Product Type: Notebook Battery Battery Rechargeable: Yes Battery Size: Proprietary Battery Chemistry: Lithium Ion (Li-Ion) Battery Capacity: 4800 mAh Output Voltage: 11.1 V DC Weight (Approximate): 1 lb