Umbrella hub and battery pack assembly

An umbrella hub assembly, comprising:

• an inner periphery configured to be disposed about an umbrella pole;
• an outer periphery disposed outward of the inner periphery;
• a hub body extending from the inner periphery to the outer periphery, the hub body extending between a top portion and a bottom portion of the umbrella hub assembly;
• an array of strut connection zones disposed in the hub body at or adjacent to the outer periphery;
• a power receptacle projecting from the bottom portion of the hub body, the power receptacle disposed between a first circumferential surface disposed adjacent to the inner periphery, a second circumferential surface disposed adjacent to the outer periphery, a first end surface extending between the first circumferential surface and the second circumferential surface, and a second end surface extending between the first circumferential surface and the second circumferential surface opposite the first end surface;
• an upwardly facing support surface disposed on one of the first end surface and the second end surface;
• and
• a battery pack comprising:
• a housing comprising a side profile configured to allow the battery pack to be inserted into the power receptacle such that an upper end portion of the housing can be disposed in the power receptacle;
• a battery cell disposed in the housing configured to supply or receive power through a contact disposed at an upper end of the battery pack;
• and
• a downward facing surface disposed on a lateral portion of the housing, the downward facing surface facing away from the upper end portion,
• wherein the downward facing surface is configured to rest on the upwardly facing support surface of the umbrella hub assembly.