We use flashlights, but there is an issue that it’s working is completely dependent on batteries, and the batteries get drained shortly. So, to resolve this issue, we will teach you about how to convert cheap flashlights to lithium.
Let us note down the list of supplies that are essential to convert cheap flashlights to lithium. They are as follows:
- Wire snips
- 18650 batteries
- TP4056 charger module
- MT3608 step-up converter
- Hot Glue Gun
- Rotary Tool
- Soldering Iron
- Utility Knife
- Precision Screwdriver
Steps To Convert Cheap Flashlights to Lithium
Step 1: The first step is to use the screwdriver and disassemble the entire cheap flashlight.
Dissembling the Flash Light
Step 2: Remove the support rails from the outer shell.
Removing the Rails
Removing the Rails
Step 3: While grinding, we have made a small notch where you can access the hatch which you have placed inside the TP4056 charger board in the lithium cell.
Accessing the Hatch
Step 4: In this step, you have to solder the battery connection.
Soldering the Connections
Step 5: Connect the wires with the extra switch, which will cut the additional voltage.
Connecting Extra Wires
Step 6: Set the voltage meter to 4.5 V and check the voltage.
Checking the Voltage
Step 7: At the end, connect two wires from the output pads of the step board to the original wires that were previously connected with the battery terminals.
Connecting the Wires
Step 8: Now, use the hot glue gun and make sure all the components are sticked
Sticking the Components
Step 9: Secure the screws with the help of the Screwdriver.
Securing the Screws
Step 10: Solder the extra wires in the hole.
Soldering the Additional Wires
Step 11: Finally, add the cover back, and your project is finally connected.
Adding the Back Cover
Flashlight with Lithium
Things To Remember
- Make sure all the connections are soldered appropriately.
Saquib Siddiqui is a Mechanical Engineer and a content creator. He has special interest in science experiments and teaches the same to school and college students. He is also a technical lead at RUDE LABS PVT. LTD.