DIY 18650 Power Bank Case 8/10 Bay – Dual USB & LED Display

Build Your Own High-Capacity Portable Charger

Take control of your power on the go with this DIY 18650 Power Bank Case. Available in 8-bay (L8) and 10-bay (L10) configurations, this clever charger shell lets you customize your power bank capacity using standard flat-top 18650 batteries. Whether you're traveling, camping, or just need a reliable backup for your iPhone, Samsung, Xiaomi, or Huawei — this case has you covered. Note: 18650 batteries are not included.

Made in Mainland China.

Key Features

• ✅ DIY Customizable Power Bank: Choose 8-bay or 10-bay capacity — compatible with flat-top 18650 batteries. Build the power bank that suits your lifestyle.
• ✅ Multi-Port Simultaneous Charging: Features 2× USB-A output ports and 2× Micro USB input ports, so you can charge multiple devices at once — smartphones, tablets, earbuds, and more.
• ✅ LED Digital Power Display: Real-time battery level indicator on the built-in LED screen — always know exactly how much charge you have left.
• ✅ Built-in Dual LED Flashlight: Two bright LED flashlights built right in — perfect for camping, hiking, emergencies, and power outages.
• ✅ Portable & Durable Design: Compact, lightweight body with a textured fireproof finish for everyday carry and long-lasting durability.
• ✅ Safe & Easy Assembly: Clear positive/negative pole markings, foolproof design, and detailed instructions make setup simple. Built-in overcharge, over-discharge, and short-circuit protection keep you and your devices safe.

Specifications

Who Is This For?

This DIY power bank case is ideal for tech enthusiasts, outdoor adventurers, preppers, and anyone who wants a customizable, high-capacity portable charger without the premium price tag. Build your own power station for camping trips, travel, emergencies, or everyday use — your way, your capacity.

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For more information on safe battery use and lithium-ion battery safety, visit the FDA's Battery Safety Information for Consumers.

Frequently Asked Questions

Q: Do the 18650 batteries come included with the DIY power bank case?

A: No, the 18650 batteries are not included. You will need to purchase flat-top 18650 batteries separately. This case supports 8 batteries (L8 model) or 10 batteries (L10 model), allowing you to choose your preferred capacity.

Q: What devices can I charge with this 18650 power bank case?

A: This power bank case is compatible with a wide range of USB-charged devices, including iPhone, Samsung, Xiaomi, Huawei smartphones, tablets, Bluetooth earbuds, and more. It features 2× USB-A output ports for simultaneous charging of two devices.

Q: Is the DIY power bank case safe to use?

A: Yes! The case is built with overcharge, over-discharge, and short-circuit protection. The housing is made from high-quality fireproof material, and clear polarity markings help ensure safe and correct battery installation.

Q: What is the difference between the L8 and L10 models?

A: The L8 model holds 8 × 18650 batteries, while the L10 model holds 10 × 18650 batteries. The 10-bay version offers greater total capacity, making it better for extended trips or charging larger devices like tablets.

Q: Can I use the flashlight feature independently?

A: Yes! The dual LED flashlights can be activated independently of the charging function, making this power bank case a handy tool for camping, hiking, power outages, and other emergencies.