If you plan on using deka batteries, step up and get a real battery, like this one,
2 of these bad boys and you have 400amps of power on tap at 13.8v. I have used the 150ah version if this same battery (2 of them) the 12avr150ft I think they are, at any rate they gave me 300 amps ( 300 a/h) at 13.8v running off a stock alt on an 89 jeep Cherokee. Made a mounting area I the rear and covered it with wood to cover the batts then put an 1 driving 2, driving an 8 pill system in. I could run the ac, stereo and everything else I the truck and never have to touch the has on key up. Voltage never sagged and always held steady at 13.8v on the voltmeter I had installed as well. They are not cheap and weigh around 130-160lbs per batt. But I will say this they were the baddest batteries I have worked with, have installed many into cell sites for battery back up systems. These batts are made to handle an 8hr load before seeing any drop in voltage. After that a small voltage spike will occur, then a fast fall of of voltage will occur, this was per deka unigy when I spoke with them upon ordering 2 of these back in the day (2003), each batt was around 400 shipped. But with 1 of the 200 amp batts like pictured you could run a 4-6 transistor amp with one of these and probably will never make it break a sweat. These batteries are a beast and like I said are made to handle heavy loads on them. Read up on them, I know they are heavy and expensive, but if you are wanting to play big then this is one way to go, I never had an issue with my system, 2 batts In parallel and I used a #2awg wire from the batts to my alternator to charge the batts at the rear, then my power from the batts went to the amp, always ran double fuse protection, one up front and one in the rear, get the good ones from any car stereo shop. These batts aren't for most but those willing to pay will be rewarded with a battery that will last over 5 years (they claim 10 year life span), and that can put out 200 a/h for 8hrs at 1.75vpc. They are truly an amazing battery and make some serious power. I can tell you this also, with 2 of the batts listed above you could have one hell of a mobile setup with 400 amps of power on tap, and no these won't drop under load like a regular battery as they are rated in amp hours not cca (cold cranking amps). These are the REAL DEAL!! But like I said there are some downfalls to them, 2 being weight and size, but if space or weight don't bother you or you have enough of both (space and extra weight cap) then these are the cats meow. They are sealed batts so you can use the indoors, we use these same type batts in the 150-180 amp hour class in cell sites, mind you they are stacks with up to 20 of these batts ran in either a -48vdc or 24vdc config. I wish i still had those batts, unfortunately I fell on bad times and had to part with them, and they are still in use to this day in a car stereo system that runs 4 15" woofers on 2 big amps. My cousin that got they from me was blown away at the power they had, he put a 75 amp load for alternator testing on one and about burnt the tool up as the batt hit that meter with 150amps, it turned the coil in the amp meter cherry red hot and about burned my cousin lol. He said they look like something off the space shuttle lol. Anyway just some food for thought, I am sure that a good alternator will cost more than one of these 200 amp batts, what does a 200 amp alt cost these days? This is JMO. God bless.
2 of these bad boys and you have 400amps of power on tap at 13.8v. I have used the 150ah version if this same battery (2 of them) the 12avr150ft I think they are, at any rate they gave me 300 amps ( 300 a/h) at 13.8v running off a stock alt on an 89 jeep Cherokee. Made a mounting area I the rear and covered it with wood to cover the batts then put an 1 driving 2, driving an 8 pill system in. I could run the ac, stereo and everything else I the truck and never have to touch the has on key up. Voltage never sagged and always held steady at 13.8v on the voltmeter I had installed as well. They are not cheap and weigh around 130-160lbs per batt. But I will say this they were the baddest batteries I have worked with, have installed many into cell sites for battery back up systems. These batts are made to handle an 8hr load before seeing any drop in voltage. After that a small voltage spike will occur, then a fast fall of of voltage will occur, this was per deka unigy when I spoke with them upon ordering 2 of these back in the day (2003), each batt was around 400 shipped. But with 1 of the 200 amp batts like pictured you could run a 4-6 transistor amp with one of these and probably will never make it break a sweat. These batteries are a beast and like I said are made to handle heavy loads on them. Read up on them, I know they are heavy and expensive, but if you are wanting to play big then this is one way to go, I never had an issue with my system, 2 batts In parallel and I used a #2awg wire from the batts to my alternator to charge the batts at the rear, then my power from the batts went to the amp, always ran double fuse protection, one up front and one in the rear, get the good ones from any car stereo shop. These batts aren't for most but those willing to pay will be rewarded with a battery that will last over 5 years (they claim 10 year life span), and that can put out 200 a/h for 8hrs at 1.75vpc. They are truly an amazing battery and make some serious power. I can tell you this also, with 2 of the batts listed above you could have one hell of a mobile setup with 400 amps of power on tap, and no these won't drop under load like a regular battery as they are rated in amp hours not cca (cold cranking amps). These are the REAL DEAL!! But like I said there are some downfalls to them, 2 being weight and size, but if space or weight don't bother you or you have enough of both (space and extra weight cap) then these are the cats meow. They are sealed batts so you can use the indoors, we use these same type batts in the 150-180 amp hour class in cell sites, mind you they are stacks with up to 20 of these batts ran in either a -48vdc or 24vdc config. I wish i still had those batts, unfortunately I fell on bad times and had to part with them, and they are still in use to this day in a car stereo system that runs 4 15" woofers on 2 big amps. My cousin that got they from me was blown away at the power they had, he put a 75 amp load for alternator testing on one and about burnt the tool up as the batt hit that meter with 150amps, it turned the coil in the amp meter cherry red hot and about burned my cousin lol. He said they look like something off the space shuttle lol. Anyway just some food for thought, I am sure that a good alternator will cost more than one of these 200 amp batts, what does a 200 amp alt cost these days? This is JMO. God bless.
Normal voltage when running is 14.5 VDC +.