A reliable, hi performance laptop battery is essential to today’s fast paced lifestyle. Lucky for you that Amstron Power Solutions provides you with quality. The LAC-18 laptop battery is designed to be 100% compatible with Acer OEM part numbers 91.40C28.001, BTP-25D1 and CGP-E/618AE. Amstron Lithium-ion batteries provide a superior and reliable replacement battery that fits the Acer Travelmate 330 series notebook. • Intelligent Battery • Voltage: 10.8 Volt • Capacity: 3600mAh • 1 Year Warranty