Sony/ Ericsson DPY901524/ BST 36 battery Standard capacity Lithium Ion battery is the factory original battery designed and built specifically for the Sony/ Ericsson J300a/ K750i cell phone models.Detailed Specs:OEM Part Number: BST 36, Other OEM Part Numbers BST 36 BST36 BKB 193 199 / 1 R2A BKB 193 199 BKB 193 199, Battery Type: Li Polymer, Battery Capacity: 780 mAh, Voltage: 3.7V, Weight: 16 gra