DIY - 4S1P Li-Ion 18650 3400mAh Battery

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.

18650 Li-Ion Batteries - https://bit.ly/2KWxf43

Solder Station - https://bit.ly/2rDxdWR

Tweezer https://bit.ly/2wxEgVC

Larger Iron tip - https://bit.ly/2rDiF9F

40mm heat shrink tube - https://bit.ly/2wD0rKp

Some silicon wires

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

With one knife scrape both poles, plus and minus.

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

Put your solder iron at 350/400º degree.

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

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

Almost done!

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.