I already read the other posts about this and saw that you closed it 'as designed'. However, I just ran into this myself and I felt it should be reevaluated.
Without an MFSU you cannot discharge or charge laptrons (that's obvious anyways). If you have 6 cyrstals, some charged, some depleted, and craft 6 laptrons, there's no visual indicator which ones retained their 10% charge. When one then goes to craft their first MFSU they're left going "WTF?!" when nothing works.
This happened to me and I ended up having to invedit the bloody charge off so they were all depleted. Ofcourse I didn't have enough resources to craft superflous laptrons or I would have just made some more.
Proposed Simple Solution: Energy crystals should NOT retain any charge when crafted into Laptrons.
Proposed Preferred Solution: Crafting recipes shouldn't care what the charges of components are and those charges should just pass into the item being crafted (When relevant).
Thanks for your time and an absolutely awesome mod.