4-Cell 18650 Power Bank Case – 12000mAh QC Dual-USB + LCD Display (DIY Shell or Complete Pack, Black/White)

Compact. Fast. Customizable. This 4-cell 18650 power bank case is designed for iPhone, Android, and USB-powered devices. Available as a DIY shell or a complete pack pre-built with high-quality cells.

Features

• Capacity Platform: Holds 4× 18650 cells (1S4P). With 4× 3000mAh cells ≈ 12,000mAh at 3.7V nominal.
• Quick Charging: Dual USB-A + USB-C QC outputs for phones, tablets, and more.
• LCD Display: Live battery percentage readout.
• Portable Design: Slim and pocket-friendly, available in Black or White.
• Protections: Built-in overcharge, over-discharge, and short-circuit protection.

Choose Your Version

• DIY Shell (No Cells): Case + built-in control board. Add your own matched 18650 cells.
• Complete Pack (With Cells): Professionally assembled with 4× Samsung 30Q 3000mAh cells (~12,000mAh). Spot-welded, balanced, and tested by RenewSpark.

Safety Notes

• Use only identical cells in DIY builds.
• Capacity ratings are based on nominal voltage; real-world results vary by cells and load.
• Check airline regulations before traveling with power banks over 100Wh.

Backed by RenewSpark 30-day money-back guarantee.