A MFSU 
or MFE 
taking long to charge those lapotron and energy crystals? well you could add an over clocker upgrade to an MFSU or MFE to make it charge faster! Seems like a good idea wont it?
Suggestions: MFE,MFSU Overclocker upgrade compatible
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Or you know, you could just wait like any normal person would..
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- Official Post
It's already possible with the Chargingbench-Addon (Overclockers in the chargingbench are possible).
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i agree with this idea, or impliment the Insta-Charge Plate, or Static Rechargers that affect inventory items like crystals and tools.