The Elixir Collector collects Elixir from an unlimited underground reserve and stores it until collected by the player and placed into an Elixir Storage. When the collector is full, production will be stopped until it is collected (or raided by an enemy player).
The production rate and capacity depends on the level of the Elixir Collector. Players can get an idea of how much Elixir the collector is storing by how full the tank appears.
The Elixir Collector takes up a 3×3 space.
When you choose to upgrade an Elixir Collector, it will automatically collect any uncollected Elixir. Note that if your Elixir Storage are full at that time, the uncollected Elixir will be lost! During the upgrade the collector stops producing Elixir.
Once the Elixir Collector is level 5, you can temporarily boost its production with Gems. Spending Gems will double the Collector’s production for 1 day.
When you click to boost the Elixir Collector a clock appears for a few seconds.