Does Fast Charging Damage the Battery?

[AlanaRose]

Fast charging can damage the battery. Methods to check battery condition include: 1. Check for leakage, swelling, bulging, or severe damage; 2. Connect a 12V light or motor to see if it operates; 3. Observe the charger's response—if the charger shows a red light and starts charging, the battery is fine; if it shows a green light and the battery heats up, there is a fault; 4. Use a multimeter to measure voltage—connect the red probe to the positive terminal and the black probe to the negative terminal, set the multimeter to DC voltage mode, and check if the reading matches the rated voltage; 5. Use a dedicated battery tester to directly read the battery's condition.