This is a 9-compartment storage box specifically designed for 18650 cylindrical lithium batteries, crafted in a single piece from black matte material. Each circular compartment is precisely sized to match the standard dimensions of an 18650 battery (diameter 18 mm, length 65 mm), ensuring a secure, stable fit without any wobbling once the battery is inserted. The design balances convenience and safety: the individual compartments effectively prevent accidental contact between the positive and negative terminals, thereby avoiding short circuits, while the varying heights of the compartments make it easier to insert and remove the batteries. The compact overall structure makes it ideal for placement on a repair workbench, in an electronics project workspace, or in a household emergency kit, helping to keep commonly used 18650 batteries neatly organized and safely managed in one centralized location.