The Acer KT.0030G.022 is an AP19B8K replacement battery component for the Aspire A3SP14-31PT, listed by Acer as a service part. Check the model and part number when matching it to a laptop.
Its lithium-polymer pack uses a 3S1P configuration. The specified capacity is 3830 mAh, with typical energy capacity of 43 Wh, rated voltage of 11.25 V and a 45 W rating.
The listed dimensions are 248 × 84.4 × 5.5 mm, useful for checking the battery variant against the space and part required.