The HWG AP13J3K/AP13J4K Battery is designed for Acer Chromebook laptops, specifically compatible with models like C720 and C740. It has a battery capacity of 45WH and operates at a voltage of 11.4V with 4 battery cells in a LiPo type. The battery is black in color and comes with replace part numbers AP13J3K and KT.00304.001. This product is suitable for Acer Chromebook users in need of a reliable battery replacement to power their devices for extended periods.