The approximately 23mm-by-3mm device stayed in Warwick's arm for only nine days - partly to avoid medical complications, partly because it was fairly limited in power.
Injuries and off-the-field problems, which at one point saw him seek medical help, have limited his participation, and last season effectively ended in disaster prematurely on February 14 when he broke his arm in a rash challenge on Aston Villa's George Boateng.