Q: Q: Why does my battery keep dying?

asked by on

My car battery went flat i charged the battery and it was fine after using it for a few days it went flat again, the battery only 12 months old iv had the battery and alternator test and they are both fine

My car has 90000 miles.
My car has a manual transmission.

This may be a sign of a failing voltage regulator. As you know, the alternator is responsible for charging the battery while the engine runs by generating amperage and recharging the battery while the engine turns the alternator. The voltage regulator is a unit that regulates the charging of the battery by the alternator. Often times when the voltage regulator is not working properly, this will result in the alternator allowing too much power to be delivered to the battery resulting in damaging wires and prematurely destroying the battery. I would recommend having an expert from YourMechanic come to your location to diagnose your vehicle’s charging system.

Was this answer helpful?
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
  1. Home
  2. Questions
  3. Q: Why does my battery keep dying?

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Fault codes P0098 and P0238 - 2011 Volkswagen Golf

Hi there. The two OBD-II error codes you posted including the P0098 OBD-II Trouble Code and the P0238 code are similar in many ways. The P0098 code indicates that there is an issue with the intake air temperature sensor...

Q: Would fuel tank float cause the transmission to slip?

The fuel float in the fuel tank has nothing to do at all with the transmission and would not have any impact on the transmission slipping problem you describe. Transmission slippage occurs generally when the transmission is low on fluid...

Q: Why car won't start help. Tried to help with obd.

Among the possible faults that you have listed, the crankshaft position sensor (CPS) is particularly noteworthy. If the CPS has indeed failed such is a very common cause of no starts. Consequently, your most efficient option would be to request...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...