What does increased battery discharge in BMW Z4 mean?

1 Answers
DelCharlotte
07/25/25 3:35am
Increased battery discharge in BMW Z4 means that the originally set voltage lower limit was at a certain value, but now the discharge lower limit is even lower. Methods to start BMW Z4 with dead battery: Start with a car emergency jump starter, jump start with a charged battery, or start after charging the battery to above 13.4V. Precautions for BMW Z4 battery usage: After starting, charge at 1500 RPM. After 20 minutes, it can provide enough power for one engine start. After 30 minutes, it can provide enough power for the next day's start. Measure the battery voltage with a multimeter. Generally, if the voltage is below 13.4V, the car will be difficult to start. If it's below 10.5V, the battery is undercharged. This can also be judged visually. At this time, the battery voltage might be high, but the charge might be insufficient to start the car. An aging battery with significantly reduced capacity shows the following symptoms: it charges quickly but drains immediately, has normal no-load voltage, but the voltage drops below 10V during startup.
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