Before knowing ‘how to recharge mind’ we must know about discharging mind that how it happens. If anybody knows the genuine cause of discharging mind, I say that they definitely may know automatically about ‘how to recharge mind. Buddha quotes; let know the cause first and thereafter solution (dukh nivaran) will get automatically.
Causes of discharging mind; is ignorance, ignorance > less concentration > sensual overload > discharging mind.