Battery Amps.
06-20-2017, 07:25 AM
#1
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Year: 1994
Model: Grand Cherokee
Engine: 4.0 6L
Battery Amps.
My Grand Cherokee Laredo 1994 4.0 6IL, needs a new Battery, what would be the
correct Amperes I got to purchase ?? I havent find that information on the
Owners Manual, and the one I have in use, cant read any info. Thanks in advance.
correct Amperes I got to purchase ?? I havent find that information on the
Owners Manual, and the one I have in use, cant read any info. Thanks in advance.
06-20-2017, 01:33 PM
#2
Old fart with a wrench
Okay, after doing a little research, it looks like 650 CCA Group 34 is a good fit, but I have a 650 CCA Group 65 in my 2000 Grand Cherokee Laredo 4.0 and it's MAMMOTH! Your climate doesn't see extended below zero temps so unless you run an electric winch or radio transmitter, lots of off-road lights, or a large sound system, a Group 34 should be good. A lot of people will put the largest battery that will fit in the battery box, but sometimes it's a waste. The Group size is determined by the plates in the battery and how long it will supply the cranking amps before dying.
Your call!
Your call!
Last edited by dave1123; 06-20-2017 at 01:36 PM.
06-20-2017, 10:51 PM
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Year: 2002
Model: Grand Cherokee
Engine: 4.0L (AMC) Straight Six
The Duralast Platinum (AutoZone) battery is pretty good... the girl who owned my WJ before me put it in in 2013 and it JUST lost its charge... so they DO last. 
06-21-2017, 06:48 AM
#5
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Year: 1994
Model: Grand Cherokee
Engine: 4.0 6L
Thank you guys for the info. By the way, what would be the equivalent in
Amperes/hour, for the Battery you suggested ?? 650 CCA = ..... AMP/hour ??? Here in Uruguay, the Batterys Brand offer the info in Amperes /Hours.-
Amperes/hour, for the Battery you suggested ?? 650 CCA = ..... AMP/hour ??? Here in Uruguay, the Batterys Brand offer the info in Amperes /Hours.-
06-21-2017, 07:39 AM
#6
Old fart with a wrench
Well, that's the thing. Amp/hours depends on plate size, or physical size, to determine how long it will last before needing to be recharged. This is not too important for a "top-charge" or starting battery because it's being recharged as long as the engine is running. Amp/hours are important to determine how long your engine will stay running if the alternator stops functioning. Cold Cranking Amps (CCA) determines how long a battery will crank your engine without overheating and are rated at 0*F and 32*F (CA). Amp/hours are important for a deep-cycle battery for use in an electric vehicle like a golf cart or wheelchair. (or boat)
Amp/hours is a rating on how many hours a battery will last until 1/2 depleted at a given draw. Reserve capacity (RC) is how long it will last before it's totally dead. This is without being supported by an alternator or generator.
Again, it's a choice you will have to make depending on how you use it. I'm not trying to confuse you, just make you aware of how ratings are made.
To make your decision a little easier, you'll need a larger amp/hour rated battery if you have any heavy duty draw cycles like an electric winch, off-road lights, on-board air compressor, radio transmitter, cooling fans, rear window heater, or other short term loads that the alternator can't carry and still charge the battery. A 100-watt sound system comes to mind! If you DO have a massive load, you'll probably need a larger alternator as well.
Amp/hours is a rating on how many hours a battery will last until 1/2 depleted at a given draw. Reserve capacity (RC) is how long it will last before it's totally dead. This is without being supported by an alternator or generator.
Again, it's a choice you will have to make depending on how you use it. I'm not trying to confuse you, just make you aware of how ratings are made.
To make your decision a little easier, you'll need a larger amp/hour rated battery if you have any heavy duty draw cycles like an electric winch, off-road lights, on-board air compressor, radio transmitter, cooling fans, rear window heater, or other short term loads that the alternator can't carry and still charge the battery. A 100-watt sound system comes to mind! If you DO have a massive load, you'll probably need a larger alternator as well.
Last edited by dave1123; 06-21-2017 at 08:01 AM.
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06-22-2017, 07:01 AM
#8
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Year: 1994
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Well, that's the thing. Amp/hours depends on plate size, or physical size, to determine how long it will last before needing to be recharged. This is not too important for a "top-charge" or starting battery because it's being recharged as long as the engine is running. Amp/hours are important to determine how long your engine will stay running if the alternator stops functioning. Cold Cranking Amps (CCA) determines how long a battery will crank your engine without overheating and are rated at 0*F and 32*F (CA). Amp/hours are important for a deep-cycle battery for use in an electric vehicle like a golf cart or wheelchair. (or boat)
Amp/hours is a rating on how many hours a battery will last until 1/2 depleted at a given draw. Reserve capacity (RC) is how long it will last before it's totally dead. This is without being supported by an alternator or generator.
Again, it's a choice you will have to make depending on how you use it. I'm not trying to confuse you, just make you aware of how ratings are made.
To make your decision a little easier, you'll need a larger amp/hour rated battery if you have any heavy duty draw cycles like an electric winch, off-road lights, on-board air compressor, radio transmitter, cooling fans, rear window heater, or other short term loads that the alternator can't carry and still charge the battery. A 100-watt sound system comes to mind! If you DO have a massive load, you'll probably need a larger alternator as well.
Amp/hours is a rating on how many hours a battery will last until 1/2 depleted at a given draw. Reserve capacity (RC) is how long it will last before it's totally dead. This is without being supported by an alternator or generator.
Again, it's a choice you will have to make depending on how you use it. I'm not trying to confuse you, just make you aware of how ratings are made.
To make your decision a little easier, you'll need a larger amp/hour rated battery if you have any heavy duty draw cycles like an electric winch, off-road lights, on-board air compressor, radio transmitter, cooling fans, rear window heater, or other short term loads that the alternator can't carry and still charge the battery. A 100-watt sound system comes to mind! If you DO have a massive load, you'll probably need a larger alternator as well.
06-22-2017, 12:27 PM
#9
Old fart with a wrench
Glad I could help. Several sites I went to said a group 34 is the normal one for your jeep.