21700 18650 6x Cell Power Bank Case DIY Quick Charge Portable Battery Enclosure with Digital Display

Overview

When designing custom portable power solutions or recycling cylindrical lithium-ion cells from old battery packs, makers and electronics enthusiasts need a safe, robust housing enclosure to assemble them into a functional unit. Traditional pre-built power banks limit customizability and make cell replacement impossible. The 21700 18650 6x Cell Power Bank Case provides a professional DIY enclosure solution, allowing you to build a high-capacity, multi-protocol fast-charging power bank using interchangeable lithium cells while monitoring performance via an integrated digital display.

Key Features

• Flexible Cell Capacity: Accommodates up to 6 cylindrical cells, supporting both popular 18650 and larger-capacity 21700 lithium-ion batteries.

• Smart Digital Display: Built-in LED screen clearly shows real-time battery percentage, charging voltage, and current status.

• Multi-Protocol Fast Charging: Integrated advanced charging circuit supports high-efficiency input and output for rapid device powering.

• Secure Enclosure Design: Snug internal slot layout and sturdy casing protect cells from physical shock and accidental short circuits.

Technical Specifications

Common Applications

• DIY Power Banks: Custom assembly of high-capacity portable power sources for smartphones, tablets, and field electronics.

• Battery Pack Repurposing: Safely housing harvested lithium-ion cells from electric scooters, laptops, or power tools for secondary use.

Note to customers: This is an empty enclosure shell with a control PCB; batteries are not included and must be installed with correct polarity matching!