This is SF853496SH25 2500mAh 11.1V Li-polymer battery.
Type: Lithium Polymer
Nominal Capacity: 2500mAh
Nominal Voltage:11.1V
Configuration:3S1P
Dimensions(T*W*L): 26.8*34.0*103.0mm (middle value)
Weight: Approx.: 194g
Maximum Continuous Discharge:25C
Maximum Continuous Current:62.5A
Ideal for use in T-REX450 PRO and other RC models.