Unboxing DIY 2×18650 USB Type-C Battery Charger Case Power Bank
Best Deal Alert! You can now buy DIY 2×18650 USB Type-C Battery Charger Case Power Bank from Aliexpress.com for only $6.65. Hurry up, limited time offer!
Meet DIY 2×18650 USB Type-C Battery Charger Case Power Bank
As someone who constantly tests gadgets, chargers, and portable power solutions, I’m always curious about simple DIY products that can solve real everyday needs. This time, I spent some time with a very practical accessory: the DIY 2×18650 USB Type-C Battery Charger Case Power Bank. This is not a traditional sealed power bank — instead, it’s a rechargeable battery case that lets you build your own portable charger using standard 18650 lithium cells. After using it hands-on, I can say it’s a surprisingly useful little tool, especially if you already have spare 18650 batteries available.
Right out of the box, the design is simple, compact, and functional. The casing feels lightweight but solid enough for daily use, and the overall size is very pocket-friendly at about 43 × 23 × 100 mm. It’s the kind of device you can easily throw into a backpack, travel bag, or even keep in the car as an emergency backup charger. The front has a clean look with a power button and LED indicator lights that show charging status. It’s minimalistic, but it does exactly what it needs to do.
The most important thing to understand is that this is a power bank kit, meaning: The 18650 batteries are not included. You install either one or two 3.7V 18650 lithium cells, depending on your needs. This makes the device extremely flexible because you can choose the battery capacity and quality yourself. For tech enthusiasts, this is a big advantage — instead of replacing the whole power bank when the battery degrades, you simply replace the cells.
One feature I really appreciated is the anti-reverse installation protection. The included instructions clearly explain battery orientation, and the case is designed so that if you accidentally insert a cell backwards, it will not burn the circuit board. Even better, if one battery is installed correctly, the unit can still operate normally. That’s a very smart safety feature for a DIY product like this.
Modern devices need modern ports, and this case includes USB Type-C input, supporting up to: DC 5V / 2A input & DC 5V / 2A output. In real use, that means it can charge most smartphones at a decent speed, especially in emergency situations or while traveling. I also like that Type-C makes it easier to integrate into today’s charging ecosystem, since most of us already carry USB-C cables.
The power bank outputs through a standard USB port, so it works with virtually anything: Phones, Bluetooth earbuds, smartwatches, small cameras, and other USB-powered gadgets. It’s essentially a universal backup charger, and because you supply the batteries yourself, it can be very cost-effective compared to buying multiple sealed power banks.
The case claims a built-in capacity of around 6000mAh, which makes sense when using two decent 3000mAh 18650 cells. Of course, the real-world capacity depends entirely on the batteries you install. With high-quality cells, you can get very respectable performance for such a compact device. It’s not meant to replace a 20,000mAh premium power bank — but as a lightweight portable solution, it performs exactly as expected.
After testing it hands-on, I can honestly say this DIY 2×18650 USB Type-C Power Bank Case is a clever and practical gadget. It’s simple, portable, safe, and modern enough with USB-C support. The ability to replace batteries makes it far more sustainable than many cheap sealed power banks, and the anti-reverse protection adds peace of mind. If you already have access to good 18650 lithium cells, this is an excellent little project that turns spare batteries into a reliable everyday power companion. A small DIY gadget — but surprisingly useful in real life.
DIY 2×18650 USB Type-C Battery Charger Case Power Bank Main Features
– DIY power bank kit using 1–2 replaceable 18650 lithium batteries (cells not included)
– Compact and portable design, perfect for travel or emergency use
– Pocket-friendly size: 43 × 23 × 100 mm
– USB Type-C input for modern fast charging convenience
– Supports up to DC 5V / 2A input and DC 5V / 2A output
– Standard USB output compatible with phones, earbuds, watches, cameras, and more
– Built-in LED indicator lights and power button for easy operation
– Anti-reverse battery protection prevents circuit damage if installed incorrectly
– Flexible capacity depending on installed cells (up to around 6000mAh with two batteries)
– Sustainable design: batteries can be replaced instead of discarding the entire power bank
– Ideal for DIY enthusiasts, tech users, and anyone needing a lightweight backup charger.
Real-life scenarios where DIY 2×18650 USB Type-C Battery Charger Case Power Bank can be quite useful
– Emergency backup charger in your car for unexpected phone battery drain.
– Travel companion when you need lightweight portable power in a backpack.
– Camping or hiking trips where access to wall charging is limited.
– Powering Bluetooth earbuds or speakers during long outdoor days.
– Keeping a spare charger at the office for workdays full of calls and meetings.
– Using leftover 18650 cells from flashlights or old battery packs instead of wasting them.
– Charging your phone during power outages at home as a simple emergency solution.
– A DIY-friendly option for tech enthusiasts who prefer replaceable batteries over sealed power banks.
– Quick charging support for small gadgets like smartwatches, fitness trackers, or cameras.
– Affordable backup power for students or commuters who need a compact everyday charger on the go..
Package Content
1 x DIY 2×18650 USB Type-C Battery Charger Case Power Bank
1 x Packaging Box
Photo gallery full album here.
Did this article help you? If so, please tell me in a comment what do you think about it.
Don’t miss any of our future video tutorials, follow us on Youtube. Like us on Facebook. Join our Best Deals Telegram Channel. Join our Android TV Box Firmware Updates Telegram Channel. Subscribe now to our newsletter. If you need Tech Reviewer or Youtube Influencer read this. Donate now here to support CGR Team!
