How long does a cube take to charge?

Excuse me, could you please clarify the context in which you're asking about the charging time of a cube? Are you referring to a specific type of battery-powered device, perhaps a portable charger or a power bank? Or is it a more abstract concept, like a metaphorical "cube" that represents some form of energy storage? Assuming you're talking about a physical object that needs to be charged, the charging time would depend on several factors, such as the capacity of the battery, the power output of the charger, and whether the device supports fast charging technology. Without these specifics, it's difficult to give an accurate answer. However, in general, most portable chargers and power banks take anywhere from a few hours to overnight to fully charge, depending on their capacity and the charger being used. If you're asking about a specific product, I recommend checking the manufacturer's specifications or reviews from other users for more accurate information.