Related Clues:

• In need of recharging
• Exhausted, as a battery
• See 32 Across
• Unpopulated
• How you shouldn't be at the switch
• Like some batteries
• Dull, as a party
• "In the Dark" band's nickname, with "the"
• __ ringer
• Zonked
• In need of charging, as a cell phone
• Defunct
• Breathless?
• Beyond tired
• ___ as a doornail