Dr. Battery Advanced Pro Series Laptop / Notebook Battery for Toshiba Satellite A135-S4407 (4400mAh / 48Wh) Samsung SDI cell! 60-Day! 2 Year Warranty Type: 10.8 Volt Li-ion Advanced Pro Series Laptop Battery; Capacity: 4400mAh / 48Wh Condition: New 60-Day Money Back Guarantee. 2 Year Warranty Battery utilizes high quality Samsung SDI cells for higher performance longer life and more reliability and it guarentees to meet and/or exceed OEM specification Fast charging. Low power consumption. Built-in protection circuit ensures both safety and stability. This battery only compatible with 10.8V and 11.1V version. Check your original battery part number, if it does not match one in our list it is incompatible.