ZTHY DYNK01 Battery for Microsoft Surface 1st Gen 1769 2017 Laptop 1782 13.5''A replacement battery designed for first-generation Microsoft Surface laptops from 2017, including the Surface Laptop 13.5-inch models. This lithium-ion battery delivers 7.57V with 45.2Wh capacity (5970mAh) and is built to handle up to 500 recharge cycles over its lifespan. Each battery includes installation tools and is certified by CE and UL for safety compliance. The black battery matches part numbers DYNK01, G3HTA036H, and fits models 2-LQN-00004, KSR-00001, and DAG-00003.MPNJ60J5Itemweight0.73 poundsProductdimensions4.4 x 0.1 x 11.4 inchesPartnumberJ60J5Model