Dr. Battery Advanced Pro Series Laptop/Notebook Battery for Acer Aspire V5-131-2629 (4400 mAh) Samsung SDI cell! 60-Day! 2 Year Warranty Type: 11.1 Volt Li-ion Advanced Pro Series Laptop Battery; Capacity: 4400 mAh 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. The battery will protrude out the (bottom/side) of the laptop and will cause your laptop to sit at an angle. You may not be able to connect to a docking station with the extended battery.