Requirements
| Part | Qty | Image | Notes |
|---|---|---|---|
| Battery Housing | 1 |
| AliExpress: |
| 18650 Litium Ion Batteries | 10 |
| I had some of these kicking around. Test at about 2000 mAh each which would make this battery a 4Ah battery. |
| Spot Welder | 1 |
| DIY Battery Spot Welder |
Specifications
Configuration: 5s2p
Inside a Dewalt Knock-Off Battery
I had another battery pulled apart to fix the thermistor so here is what it looks like inside.
Build
Spot welded the batteries and wrapped in kapton tape.
Soldered on wires and inserted into battery base.
Assembled top portion
Final