I intentionally worded the title like that to avoid spoilers, so here goes the spoiler:
The Master Sword needs to recharge its energy when you use it too much. How exactly does that work? At some point you get a message, similar to weapon durability, "Your Master Sword is running low on energy" and finally after more usage that it ran out. How long does it take to fully charge? Can I speed up the process? It seems like I can almost never use it, because the recharge takes so long.