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Why Does a Car Battery Discharge Quickly?

2 Answers

VonAdrian

07/28/25 3:00pm

First, confirm whether the battery is fully charged. If it is confirmed to be fully charged but the battery capacity drops too quickly, it indicates that the battery is nearing the end of its lifespan or there may be the following reasons: Severe Sulfation of Plates: If the battery is left in a discharged or partially discharged state for a long time, under the influence of daily temperature fluctuations, the dissolution and crystallization of lead sulfate cannot maintain balance. The amount of crystallization exceeds the amount of dissolution, causing crystallized lead sulfate to adhere to the plates. Severe Water Loss: Battery water loss occurs because during charging, oxygen is released from the positive electrode and hydrogen from the negative electrode, meaning some electrical energy is consumed in electrolyzing water. This is particularly severe during charging. Water loss in the battery can lead to irreversible sulfation of the plates, reducing the battery's capacity, and in severe cases, causing the battery to become unusable. Short Circuit in a Single Cell of the Battery: For a lead-acid battery with a broken cell, the problematic cell can be individually extracted, and new plates can be replaced. Then, seal it with sealing glue. After welding the terminals, add electrolyte and charge the battery.

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NicoleDella

08/11/25 10:43pm

Recently, I've been experiencing frequent car battery drain issues. As a veteran taxi driver with over 20 years of experience, I believe the most common cause is battery aging—over time, the internal separators crack or the plates become sulfated, making it unable to hold a charge. Another possibility is a parasitic drain in the vehicle, such as a stuck trunk light switch keeping it on, or an aftermarket alarm system secretly consuming power even after the key is removed, gradually depleting the battery day by day. A faulty alternator providing insufficient charging is also problematic; even long drives won't fully charge the battery, leading to chronic undercharging. Frequent short trips are particularly harmful—each start consumes power without fully recharging, inevitably causing battery issues. My advice: always check that all lights are off when parking, use a voltmeter in winter to ensure the voltage stabilizes around 12.6V after turning off the engine, and visit a repair shop if necessary to check for parasitic drain or use a load tester to confirm battery health. Addressing these promptly can prevent embarrassing roadside breakdowns.

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What are the reasons for the non-illumination of the center console screen in the eighth-generation Accord?

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