DIY - 4S1P Li-Ion 18650 3400mAh Battery

About: I love fly. Im a electronic, robotic and automation technician. I like drawing 3D parts.

I love flying and DIY.

I checked that some people fly a lot of time with wings with these batteries, so I decided to do my own 18650 battery.

Step 1: What Do You Need?

18650 Li-Ion Batteries -

Solder Station -


Larger Iron tip -

40mm heat shrink tube -

Some silicon wires

4S balance connector, you can get it easily from one bad battery.

Step 2: Prepare Your Batteries to Solder

With one knife scrape both poles, plus and minus.

Step 3:

Join the 4 batteries with a measuring angle square and put some hot glue.

Step 4: Soldering

Put your solder iron at 350/400º degree.

Put iron solder for 2 seconds on the battery pole and put enough solder to wiring.

Step 5: Wiring

Step 6: Heat Shrink Cover

Cut a little piece of heat shrink tube more 20mm than length of 18650 battery.

Almost done!

Step 7: Already Done to Fly.

A comparison with Tattu R-line 1550mAh battery.

I can fly with my Reptile S800 Sky Shadow 40 minutes, important to say at 25% throttle.



    • Pocket Sized Contest

      Pocket Sized Contest
    • Epilog X Contest

      Epilog X Contest
    • Trash to Treasure

      Trash to Treasure

    2 Discussions

    Uncle Kudzu

    10 months ago

    Nice work! It looks very professional. Thanks for sharing links to the parts.

    That plane looks like it would be fun to fly.

    1 reply