Amazon.com: DR. BATTERY 916-3020 4UR18650F-1-QC192 Laptop Battery for Acer Aspire 5510 Series 5000 Series 3000 Series 3500 Series 1680 Series 1650 Series 1640 Series TravelMate 4000 Series [14.8V / 65Wh] : Electronics
Amazon.com: Dentsing AP13J4K 11.4V 45Wh/3920mAh Laptop Battery Compatible with Acer Chromebook 11.6" 11 C740 C720 C720P CB3-532 Series Notebook AP13J3K KT.00304.001 (4cm Long Cord) : Electronics