Acer KT.00405.010 is a Panasonic AP19B5L polymer battery pack for the Aspire A17-51M service context. Its 4S1P cell configuration identifies the pack design, while the part number helps distinguish it from other batteries in the same guide.
It has a typical capacity of 55 Wh and 3550 mAh. Acer’s specification also lists 15.4 V and 70 W, with dimensions of 248 × 84.4 × 5.5 mm. These details help check the part against the specified laptop service information.