DIY power bank case for 2x 18650/18700/20700/21700 batteries. Features easy assembly with included cables, USB Type-C and Micro ports, and anti-reverse protection.
This DIY power bank case is designed to accommodate two 3.7V rechargeable batteries including 18650, 18700, 20700, or 21700 sizes. Its compact size (approx. 56x31x90mm) and plastic construction offer a lightweight yet durable shell ideal for custom power bank projects.
Easy to assemble and disassemble, the case comes with two cables and no welding is required, making it user-friendly for DIY enthusiasts.
The case includes anti-reverse connection protection to prevent damage if batteries are installed incorrectly. It is important to install the batteries with the same positive and negative direction to avoid circuit damage.
It supports standard 3.2-4.2V lithium-ion batteries. Users are advised to use batteries in good condition and avoid those with high internal resistance or defects for optimal performance.
Equipped with both USB Type-C and Micro USB interfaces, the power bank case supports versatile input and output charging with multi-voltage and current options.
USB Output supports 5V/4.5A, 9V/2A, 12V/1.5A; Type-C Output and Input support 5V/3A, 9V/2A, 12V/1.5A providing flexible fast charging potential (original cables supplied do not support fast charging; fast-charge cables required separately).
The power bank case operates reliably between -10°C and 40°C, ensuring stable usage in various climates and conditions.
So the material is ridiculously weak. You feel like you're going to break it when you insert the batteries and even when you try to close the lid. However, once you get past all that, it works well. It's just the smallest power bank for 21700 batteries, and I would order it again if space is limited and high capacity is required.
Good product, satisfied. thanks.
Ok
Cable doesn’t seem very durable but good enough
The product and its characteristics correspond to the information provided on the website. The seller shipped the product promptly.
