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DIY 21700 Power Bank Case with 22.5W Fast Charging

Rated 5.00 out of 5

DIY 21700 battery power bank case featuring 22.5W super-fast charging, Type-C bidirectional fast charge, digital battery level display, and built-in multi-layer safety protection.

Color

Clear

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Estimated Delivery Time3–7 business days

Compact Power, Rapid Recharge

This DIY 21700 power bank case supports 22.5W super-fast charging that saves your time by enabling efficient rapid charge for your devices. Its slim, lightweight design offers portability without sacrificing power, combined with a real-time digital battery level display for practical battery management.

Designed for convenience, this case uses a solder-free design allowing quick installation of two 21700 cells (not included) without needing tools or expertise. The Type-C port supports bidirectional fast charging, suitable for a wide range of modern devices.

Advanced Safety and Compatibility

Equipped with a high-performance Zhirong S620 fast-charging chip, the mainboard offers multi-layer protection including overcharge, over-discharge, overvoltage, and overheat safeguards. This ensures stable current and voltage flow, protecting both batteries and connected devices.

The battery compartment is clearly marked for correct polarity. Reverse-polarity protection prevents damage from incorrect installation, and included foam pads secure batteries to prevent poor contact. The design accommodates variations in 21700 battery sizes for stable performance.