car battery

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Well there are 2 answers to that question.... YES ... and ... NO!

It all depends on how much power your accessories are sucking off it first. And how much current your amp requires in order to put out that 800W. usually the manufacturer will leave room for stuff like this. Obviously it's not the battery that keeps the current supplied, the battery merely holds a charge while the car is not turned on. Once the car is turned on the amplifer takes over, and handles the job. However once the alternators peak output is reached, it will receive help from the battery for the remaining amount of current needed. This may cause lights to dim, since now the system is weakened. The amplifier must fight to recharge the battery as well as keep all the accessories running. This is not only a strain on the alternator, but also in the long term will cause problems with the battery. This is also bad should your speaker amplifier not have a voltage protection. Many amps are damaged this way! Running a lower voltage then the amp can handle will cause it to overheat (dont ask why, its complicated... just listen)... Usually amps can run from anywhere between 10V and 15.8V, below or above this range it will go into protection and shutdown. However most charging systems on cars run around 13.5 to 14.4V, so this is much of a problem.

Though since not amplifiers have this protection, some people try and benefit from this, and utilize higher current/higher voltage alternators and batteries. ok.. .anyways, well you get the point, although should you ever consider changing you alternator, just remember that higher voltage does equal higher current. When buying a new alternator always have a look at it's current output (amps). They are usually rated at their peak power (which you'll never see at idle).

Check out a couple of the threads here for more info on Battery and Alternator output.

Threads and Info on Alternator and Battery Output!
 
WOW... such a long answer for such a small question...

who woulda thought?

:laugh: :devil: :laugh:
 
yeah i know... :D But battery problems will eventually cause alternator problems. So it's better off he learns a little more.
 
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