Now, Not Later

Tactic
Recharge 16+ after battle
Action: 
Free
Target: 
One nearby ally using a recharge power
Effect: 

The target can make a recharge roll for that power immediately after using the power. (If the recharge roll fails, the target can still make a recharge roll for it after the battle.)

Epic Feat: 

The target gains a bonus to the recharge roll equal to your Charisma modifier.