72v 20ah Battery case expansion guide and new Hailong battery case News 80Pcs

0:00 21700 72v 20ah battery diy
2:02 Battery Placement
2:43 Spot welding begins
3:18 BMS balance cable connection
4:35 Connect the wires at the bottom of the battery case
6:24 Battery Case Cutting
8:55 Battery Pack Mount Adapter
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