Smart Rechargeable 9V Battery
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Rechargeable 9V battery using a Li-ion cell, TP4056 charger and MT3608 boost converter in a 3D printed case.
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Model information
- Source
- Printables
- Category
- Electronics
- License
- Creative Commons — Attribution — Noncommercial
This is a custom-designed rechargeable 9V battery built using a lithium-ion cell, a TP4056 charging module, and a boost converter (MT3608) to step up the voltage to a stable 9V output.
Unlike traditional 9V batteries, this design is:
🔋 Rechargeable via Micro USB port
⚡ Adjustable output voltage (up to 9V)
🧠 Smart and efficient power solution
🖨 Fully enclosed in a custom 3D printed case
The project uses a compact Li-ion battery (taken from a vape device), combined with a charging + boost module to create a reusable and cost-effective alternative to disposable 9V batteries.
🔋 Battery Info:
The battery used in this project is a Li-ion cell extracted from a vape.
If you don’t have this battery, you can easily find it inside used or disposable vape devices.
📌 Watch the full process of finding and extracting this battery in the video below:
⚙ Features:
• Input: 5V via Micro USB charging port
• Battery: 3.7V Li-ion cell
• Output: Adjustable (set to 9V)
• Integrated charging & protection module
• Portable and compact design
🧩 Parts used:
• TP4056 + MT3608 boost module
https://s.click.aliexpress.com/e/_c4qS7Wdd
https://s.click.aliexpress.com/e/_c3baAC9d
• Li-ion battery (3.7V)
• 9V battery snap connector
• Wires
https://s.click.aliexpress.com/e/_c3BIfLEF
https://s.click.aliexpress.com/e/_c3dJZeEP
💡 Applications:
Perfect for DIY electronics, Arduino projects, sensors, and portable devices that require 9V input.
🎬 Watch Full Build Video:
📌 For the full installation and assembly process, you can watch the YouTube video below: