Silverhawk boots can have up to 500 charges by using Silverhawk down on them. Each charge drains the boots and gives Agility experience equal to 10% of the XP rewarded from a small XP lamp when worn. Silverhawk boots require a minimum of 1 Defence to wear, and can have their stats changed to levels 20, 40, 50, or 60 at any time. XP will be gained and a charge will be used * for every minute you spend running; * occasionally while skilling (max 1 charge every 45 seconds). The following do not work: * Serenity Post * in conjunction with brawling gloves (Agility).