DIY 18650 Power Bank Case – 2-Slot Portable Charger Box

DIY 18650 Power Bank Case – 2-Slot Portable Charger Storage Box

Build your own portable power bank with this compact, solder-free 18650 battery charger case. Simply drop in your 18650 batteries, connect your charging cable, and you're ready to charge smartphones, tablets, and other USB-powered devices on the go. Available in six fun shell colors — black, white, blue, pink, yellow, and green — this DIY power bank shell is a practical and customizable charging solution for makers, travelers, and everyday users.

Key Features

• Compact & Portable: Small, lightweight design fits easily in a pocket, bag, or backpack for on-the-go power.
• Solder-Free Assembly: No tools or soldering required — just insert your 18650 batteries and you're ready to charge.
• Universal Compatibility: Works with a wide range of mobile devices; simply swap charging cables to suit your phone or gadget.
• 2-Slot Design: Holds two 18650 batteries for increased capacity and extended charging sessions.
• Multiple Color Options: White base with shell colors available in black, white, blue, pink, yellow, and green.
• DIY Friendly: Perfect for electronics hobbyists, campers, hikers, and anyone who wants a custom backup power solution.

Battery Requirements

This case requires two 18650 flat-head batteries (no protection plate) with the following specifications:

• Length: 65 mm
• Internal resistance: within 60 milliohms
• Discharge current: greater than 2C
• Voltage: not less than 3.3V

Note: Batteries are NOT included. Please ensure your batteries meet the above specifications for safe and optimal performance. Flashlight-type 18650 batteries and those not meeting the above specs are not recommended.

Specifications

• Type: DIY Power Bank Shell / Battery Storage Case
• Battery Slots: 2 x 18650
• Shell Colors: Black, White, Blue, Pink, Yellow, Green
• Battery Included: No
• Made in: Mainland China

What's in the Box

• 1 × DIY 18650 Power Bank Battery Box (batteries not included)

Looking for more useful tools and accessories? Check out the Clip-On Car Fan with USB & Type-C for portable powered comfort, or explore the Cordless Rechargeable Milk Frother for another handy rechargeable gadget. Need a storage solution? Browse our Large Capacity Zipper Organizer Bag to keep your accessories tidy.

Learn more: ENERGY STAR product efficiency guidance

Frequently Asked Questions

Q: What type of batteries does the 18650 power bank case require?

A: This DIY power bank case requires two 18650 flat-head batteries (no protection plate), 65 mm in length, with an internal resistance within 60 milliohms, a discharge current greater than 2C, and a voltage of at least 3.3V. Batteries are not included with your purchase.

Q: Can I charge different phones and devices with this 18650 charger case?

A: Yes! This power bank shell is compatible with a wide range of smartphones and mobile devices. Simply use the appropriate charging cable for your device (USB-A, USB-C, Micro-USB, etc.) to charge it from the battery box.

Q: Do I need any tools or soldering to assemble this power bank case?

A: No tools or soldering are needed. The solder-free design means you only need to insert compatible 18650 batteries into the two slots, and the case is ready to use right away — making it ideal for DIY beginners and experienced makers alike.