DIY 21700 Battery Storage Power Case – Build Your Power, Charge Your Way

Customize Your Power. Stay Charged Anywhere. DIY Never Looked This Smart

Power up your devices your way with the Detachable 21700 Battery Storage Box — the ultimate DIY power case designed for mobile phones, tablets, and all Type-C devices. Simply insert your own 21700 batteries to build a personalized, high-capacity portable charger that fits your needs. With a sleek, durable design and universal compatibility, this case is perfect for tech-savvy users, travelers, or anyone who wants reliable power on demand. Lightweight, detachable, and designed for flexibility, it gives you full control over your backup power without the limits of standard chargers.

Customizable Power Supply – Use your own 21700 batteries to create a power bank that fits your lifestyle.
Universal Type-C Output – Easily charge phones, tablets, and other modern USB-C devices.
Detachable & Reusable Design – Swap batteries anytime for unlimited power potential.
Compact & Portable – Slim build fits in your pocket or bag for on-the-go convenience.
Perfect for DIYers & Tech Lovers – Tailored for those who value performance, flexibility, and freedom.
Durable & Smart Design – Built tough with easy battery access and long-term reliability.