Does anyone know the Capacity of the Stock battery?

 

it isnt very much. i had to get a capacitor for my stereo

 

Not the current capacity, the actual capacity, in Amp-hours or Watt-Hours at a 20hr Rate.

I hate how car battery's these days are based off of their discharging rates and not their capacities

 

chev website says 535 CCA which i assume means cold cranking amps... i don't know what in the heck a cold cranking amp is... but i assume it is some function of an amp hour.

 

That is the amount of energy it's producing to turn power the starter when you fire up your car...the amp-hour is the capacity he's looking for. i.e. if it can produce the 535 CCA for 1 hour, the battery's total capacity is 535 amp-hours. (in reality, it's not that big, but I don't know the actual amount)

I may be wrong, but I think typical for a regular car battery is somewhere around 200-250 amp-hours for capacity...new, anyway. The dry cell batteries are probably a little more.

 

right, but i'm assuming it's a function that's used, as all car batteries seem to be rated this way.

 

Cold Cranking Amps is a rating used in the battery industry to define a battery's ability to start an engine in cold temperatures. The rating is the number of amps a new, fully charged battery can deliver at 0° Farenheit for 30 seconds, while maintaining a voltage of at least 7.2 volts, for a 12 volt battery. The higher the CCA rating, the greater the starting power of the battery.


autobatteries.com wowie.

 

Exactly. Basically for a car guy, it's just what it takes to get you moving.

 

i'd be curious as to why anyone cares... unless they were planning to build a drag car with no alternator.

 

Good question...I haven't the slightest idea either.

 

Probably because that's all they're used for 95% of the time. Once you're running, the alternator basically powers the car. The battery pretty much just completes the circuit.

 

Reserve Capacity, (RC) is a battery industry rating, defining a battery's ability to power a vehicle with an inoperative alternator or fan belt. The rating is the number of minutes a battery at 80 degrees F can be discharged at 25 amps and maintain a voltage of 10.5 volts for a 12 volt battery. The higher the reserve rating, the longer your vehicle can operate should your alternator or fan belt fail.

so, since i'll bet the RC rating is on the battery... just do some math here...

CAx25
-------- = amp hours? i think... i'm kinda tired here.
60

 

Not quite...CCA (I'm assuming that's you you mean by the CA), isn't figured into the actual capacity. We need current, voltage, and time. The current is already given at 25 amps, the voltage at 10.5, all we need is time. Let's say the battery runs for 1 hour at the 25 amp current, so its RC is 25 amp hours at 10.5 volts. It will be higher if you run at a lower voltage, and lower if you run a higher voltage. You can see this if you look at a AAA rechargable battery, for instance. My AAA camera batteries are rated at 850 milli-amp hours at 1.2 volts. That lets you know exactly what's in there. Volts are directly related with amps...double the voltage, half the life...give or take some depending on temperature.

 

i meant RA, sorry

RAx25
------- = amp hours
60

and i can only ASSUME we're talking about either 12 or 14.4 volts.

 

Well I got 10.5 from the definition you posted.

RC is your capacity in amp-minutes at 10.5 volts. Just divide by 60 to get amp-hours. To get it at 12 or 14.4 volts, multiply your result by either (10.5/12) or (10.5/14.4) accordingly, and minus a bit because the higher current will deplete the battery sooner due to the added heat.

Hrm...the guy that posted the original question is probably asleep by now anyway.

 

see, i took it as...

take a known 25 amp 12 volt load and run it untill the volts of the battery dropped below 10.5 that amount of time.

 

You're probably right...major mental slip for me. Voltages on these batteries very so much, I didn't even think that way at all. Even if they all say 12...

That and I'm tired like it's...well, really late on a shitty Monday night.

 

even shittier for me, my balt was supposed to be in today, won't arrive till tomorrow

 

I used to make Battelbots, so I'm **** when it comes to capacities on batterys, basically I want to figure out how much time i can run accessories without killing my battery. With the information that is given to us on the chevy website on Current Ratings, we cannot figure out the capacity of the battery. I was hoping that somone knew the Capacity offhand.

It should be in the 30-80 amp Hour range, a 200 amp hour battery should weigh WELL over 100 pounds

I'm stripping down my trunk today anyway to lose some dead ass weight anyway, so I should be able to figure it out

 

Gutted my trunk today, the Stock Battery is 53 Amp Hours for future Reference