DIY 21700 Power Bank Kit – Dual USB + USB-C + Optional Wireless Charging (No Cells)

DIY 21700 Power Bank Kit (No Cells Included)

Build your own high-performance portable power bank using this versatile DIY kit. Designed for makers, hobbyists, and tech enthusiasts who prefer full control over battery quality and performance.

🔋 Features

• Holds 4× 21700 Li-ion cells (not included)
• Dual USB-A output ports + USB-C input/output
• Optional Qi Wireless Charging (10 W) on premium model
• BMS protection: over-charge, over-discharge, and short-circuit safety
• Built-in LED flashlight and battery-level indicators
• Durable ABS plastic enclosure with copper-accent trim

⚙️ Specifications

• Inputs: Micro-USB, Type-C
• Outputs: 2× USB-A + Type-C
• Wireless Charging: 10 W (optional model only)
• Compatible Cells: 21700 Li-ion (flat-top preferred)
• Weight: 0.50 lb (0.23 kg)

🧰 What's Included

• 1× Power bank housing with pre-installed BMS and ports
• 1× Screw set for assembly

Small note: cells and wires are not included. You can find compatible 21700 cells on RenewSpark.