Nice to know[b] this perk doesn't work at all[/b] Now because of all the cry babies.
[spoiler]It's in almost every single hunters helmet. If it says [b]REPLENISH SUPER WHEN YOU KILL AN ENEMY WITH A GRENADE[/b] then you should replenish your super, yes or no?[/spoiler]
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As you said "When you [b]kill[/b] an enemy with your grenade", not hit a teammate, dead body, or simply [b]damage[/b] an enemy.