A battery charger shows “bad battery” when it finds low voltage or a dead cell. Smart chargers stop charging batteries below 10 volts to avoid damage. A sulfated battery can trick the charger into thinking it’s charged. Check battery connections for issues to fix the problem.
To address the “bad battery” warning, start by inspecting the connections. Clean any corrosion and ensure a secure fit. If the connections are fine, test the battery with a multimeter. This tool can measure voltage and determine if the battery holds a sufficient charge. If issues persist, consider replacing the battery, especially if it is old or shows signs of physical damage.
Understanding why your battery charger says “bad battery” is crucial for effective troubleshooting. After exploring these causes and solutions, you may want to know how to properly maintain your battery to prolong its life and avoid similar issues in the future.
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