need to ask something about car battery

• rainhawk87

  17 Jan 08, 01:56

  hehe really paiseh
  passed and been driving for quite a time but
  suddenly my fren said about car battery yet i cant answer.
  
  So may i ask what happen if car battery is low/ no more?we have to push car rite?
  
  is there any indicator on the meter stated the level of the battery?
  
  and how long/periodic we need to refill the battery? is it just dump to the car mechanic to handle...
  
  and which one use the car battery ?
• Turtle

  17 Jan 08, 09:45

  Hi bro, for batteries, it is only used to start the car and to maintain the memory of the electronic devices. Thus, when it is low/dead, you will not be able to start the car.
  
  When your engine is running, all the electricity comes from the engine, thus, even if you remove your battery when your engine is running, nothing will happen.
  
  But if let's say you leave your headlight on thru the night, and the battery is flat the next morning. All you have to do is to get someone to jumpstart your car for u, or if it's a manual car, to push start it. Once the engine is started, the battery will begin to charge again and you can continue using the battery.
  
  But if the battery is spoilt, even if you manage to jump/push start it, once u off the engine u will have problems starting it again.
  
  The lifespan of a battery is about 1 to 1 and a half years, but most are warranty-ed for only 1 year.
  
  For maintanence-free batteries, there is usually a window where u can see into the battery, and you can guage the state of the battery by the colour u see inside. Otherwise, u can't really tell except by using devices from workshops.
  
  Hope this helps.
• tomsss

  17 Jan 08, 11:56

  My battery lasted for 3 years
  
  
• NoobBOY

  17 Jan 08, 19:26

  A car battery has three main functions, it provides voltage and serves as a source of current for starting, lighting and ignition. It acts as a voltage stabilizer for the entire electrical system of the vehicle and it also provides current whenever the vehicle's electrical demands exceed the output of the charging system.
  
  The largest demand placed on the battery occurs when it must supply current to operate the starter motor and it may use out several hundred of amperes. After the engine has started, the vehicle's charging system recharges the battery. If the charging system fails, the battery must supply all the current needed to run the vehicle. Most of the battery can supply 25amperes for two hours before they become so slow that they are unable to keep the engine running