HSX 3920mAh 45wh AP13J4K Laptop battery for Acer Chromebook C720 C720P C740 KT00304001 AP13J4K (3ICP5/65/88) Battery type:Li-ion Voltage: 11.4V Capacity:3920mAh 45wh Compatible Part:KT.00304.001, AP13J4K, (3ICP5/65/88) Compatible Models: Acer Chromebook C720, C720P, C740. Features Brand New Laptop battery, with 1 year warranty