High-Quality Replacement Battery for Acer Chromebook 11.6' Series Restore your Acer Chromebook 11.6' C720, C720P, or C740 to optimal performance with this premium 45Wh Li-ion replacement battery. Specifically engineered for Acer's educational and consumer Chromebook series, this AP13J4K compatible battery delivers reliable power for learning, productivity, and everyday computing. Features stable 11.4V output and efficient 3920mAh capacity with a 4cm long cable for proper connectivity.