Battery Imbalance is Destroying Your Floor Washer Runtime#18650battery #21700 #lithiumbattery #1P7S

00:00‑00:48: Locate the faulty low‑voltage cell 00:48‑01:25: Charge the defective cell for repair 01:25‑01:43: Reassemble the battery and run a charging test This 7‑series 24‑volt lithium‑ion battery fails to charge, and its charger shows no response. It is caused by inconsistent cell ageing. Some weak‑performing cells drop sharply in voltage and activate low‑voltage protection on the BMS, which stops charging. You can fix it without replacing cells. Just charge low‑voltage cells separately to balance all cells. Once voltages are even, the battery will work normally again. It works for 7S batteries such as those fitted in floor washers.