Question about 2004 Hyundai Elantra
If the battery is the original, it may be due for retirement.
To separate the two items, battery and alternator, I suggest you buy an inexpensive digital multimeter.
If the engine is turning at 1,000 or more rpms, a healthy alternator will produce 13 or more volts, most will be higher.
The highest it should reach is ~ 14.3 volts, higher than that and it will cause unnecessary heating of the battery and shorten the life of it.
If you find a voltage in the range mentioned, then the battery is being charged but is unable to keep it any more.
The cost of buying a multimeter is <$20 and this is far less than the difference between buying a new battery or a replacement alternator and you will find it useful for many other tasks.
Posted on Jul 21, 2008
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Posted on Jan 02, 2017
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