21700 Lithium Cylinder Case 4S Li-Ion Cell Battery Holder
High-strength ABS plastic construction ensures durability and impact resistance. Precision-engineered contacts provide secure connections with minimal voltage drop. Compact 4S design fits seamlessly into DIY power banks, vaping mods, and portable electronics. Features reinforced snap-lock clips for effortless cell replacement without soldering. Optimized airflow slots prevent overheating during high-current applications. Compatible with all standard 21700 batteries for versatile use in robotics, solar storage, and RC vehicles. Ultra-lightweight yet rugged housing protects cells from dust and short circuits. Tool-free assembly saves time for makers and engineers. Bulk pricing available for commercial energy projects and OEM manufacturing. (Note: Strictly adheres to professional specifications while maintaining clear, action-driven language for global B2B buyers.)