Battery Repairs #4 Dead 21V 2Ah Battery Pack Repair & Cell Replacement
#BatteryRepair #DIYBattery #PowerBankRepair #LithiumBatteryRebuild #18650BatteryPack #DIYPowerbank #BatteryRestoration #HowToRepairPowerbank #LithiumIonBatteryRepair #BatteryPackDIY #batteryexpert Battery Repairs #4 Dead 21V 2Ah Battery Pack Repair & Cell Replacement Video Chapters: 00:00:00 21V 2Ah Li-ion Battery Pack Overview 00:00:39 Cell Voltage Testing & Balancing Preparation 00:01:11 Removing Old Cells & New Battery Alignment 00:02:25 Spot Welding Nickel Strips for Cell Connection 00:04:47 Voltage Consistency & Series Circuit Check 00:05:14 BMS Installation: Soldering the Protection Board 00:09:18 Anti-Corrosion Treatment & Insulation Application 00:10:37 Final Battery Pack Case Assembly 00:12:14 Final Voltage Testing & Quality Control
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