Features: This battery case features a built in protections circuit with overcharge, over discharge, overcurrent, and short circuit safeguards, ensuring safety and compatibility as an economical replacement for 18V battery packs and battery protections boards. Constructed from ABS plastic and metal components, it supports 18650 lithium configuration for enhanced capacity and lightweight design, while optimized thermal management maintains stable performances during extended use. Ideal for users, including enthusiasts and professional repair technicians seeking battery upgrades for their battery replacement needs. Perfect for demanding applications like high load drills, this battery pack case delivers consistent power output in workshops or home projects without overheating risks. With user friendly installation that not requires special tools, this battery shell simplifies assembly, making it a practical choices for extending battery life in everyday tool operations. Specifications: [Component]: ABS, Metal, PCB [Product size]: about. 75x115x62mm/2.95x4.53x2.44in [Color]: Black Package Includes: 1 Set Plastic Housing Shell note: Please allow 1-2cm errors due to manual measurement. Due to difference between different monitors, the picture may not reflect the item actual color.