3-slot battery holder designed for 18650 lithium-ion batteries. These batteries are commonly used in devices like flashlights, power tools, and laptops. 
Key Features:

• Construction: Made from durable plastic with metal contacts.

• Design: Holds three 18650 batteries in series.

• Output: Delivers a nominal 11.1V output (3.7V per cell).

• Function: Keeps batteries securely in place and provides power.

• Usage: Used in DIY electronics projects and battery-powered devices. 

• Additional Details:
  18650 Battery Specs:These are rechargeable lithium-ion cells, 18mm in diameter and 65mm in length. 

• Voltage:Each cell has a nominal voltage of 3.7V, reaching approximately 4.2V when fully charged. 

• Charging:Usually charged at 1C (1 times the battery's capacity) until 4.2V, then current is reduced to ensure safety. 

• Safety:Lithium-ion batteries require proper handling to avoid misuse. 

Note: The battery holder does not include batteries.