视频说明
In this video, I built a 20V 20Ah high-discharge battery pack using 21700 cells and a 120A BMS with balancing.
After assembling, I tested it with a handheld blower — and the performance is insane compared to standard Makita 2Ah and 5Ah batteries!
👉 Key features:
- High discharge current
- Stable voltage under load
- Much stronger performance
🔧 Components used:
- 20x 21700 high-discharge cells
- 5S 120A BMS with balancing
- 6 MOSFET high-current board
- 20V battery case (Shopee) https://s.shopee.vn/BPmu6EfjU
- Nickel strips
- Insulating pads
- Positive terminal insulating rings
- Battery indicator LED board
- Acetone (for cleaning)
- DIY spot welder
👉 Charger used: 21V 5A
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