jetmoto785
New Member
I was told this will fry the mpem if I put in a std deep cycle 12v battery over running dual jetski batterys???
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98 Speedster can I run a deepcycle battery???
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Hi & welcome to the best Seadoo forum. Where in Michigan are you located?
This may help with your question......
What is the difference between a normal lead-acid car battery and a deep cycle battery?
People who have recreational vehicles (RVs) and boats are familiar with deep cycle batteries. These batteries are also common in golf carts and large solar power systems (the sun produces power during the day and the batteries store some of the power for use at night). If you have read the article How Emergency Power Systems Work, then you also know that an alternative to gasoline-powered generators is an inverter powered by one or more deep cycle batteries.
Both car batteries and deep cycle batteries are lead-acid batteries that use exactly the same chemistry for their operation (see How Batteries Work for more information). The difference is in the way that the batteries optimize their design:
A car's battery is designed to provide a very large amount of current for a short period of time. This surge of current is needed to turn the engine over during starting. Once the engine starts, the alternator provides all the power that the car needs, so a car battery may go through its entire life without ever being drained more than 20 percent of its total capacity. Used in this way, a car battery can last a number of years. To achieve a large amount of current, a car battery uses thin plates in order to increase its surface area.
A deep cycle battery is designed to provide a steady amount of current over a long period of time. A deep cycle battery can provide a surge when needed, but nothing like the surge a car battery can. A deep cycle battery is also designed to be deeply discharged over and over again (something that would ruin a car battery very quickly). To accomplish this, a deep cycle battery uses thicker plates.
A car battery typically has two ratings:
CCA (Cold Cranking Amps) - The number of amps that the battery can produce at 32 degrees F (0 degrees C) for 30 seconds
RC (Reserve Capacity) - The number of minutes that the battery can deliver 25 amps while keeping its voltage above 10.5 volts
Typically, a deep cycle battery will have two or three times the RC of a car battery, but will deliver one-half or three-quarters the CCAs. In addition, a deep cycle battery can withstand several hundred total discharge/recharge cycles, while a car battery is not designed to be totally discharged.
This may help with your question......
What is the difference between a normal lead-acid car battery and a deep cycle battery?
People who have recreational vehicles (RVs) and boats are familiar with deep cycle batteries. These batteries are also common in golf carts and large solar power systems (the sun produces power during the day and the batteries store some of the power for use at night). If you have read the article How Emergency Power Systems Work, then you also know that an alternative to gasoline-powered generators is an inverter powered by one or more deep cycle batteries.
Both car batteries and deep cycle batteries are lead-acid batteries that use exactly the same chemistry for their operation (see How Batteries Work for more information). The difference is in the way that the batteries optimize their design:
A car's battery is designed to provide a very large amount of current for a short period of time. This surge of current is needed to turn the engine over during starting. Once the engine starts, the alternator provides all the power that the car needs, so a car battery may go through its entire life without ever being drained more than 20 percent of its total capacity. Used in this way, a car battery can last a number of years. To achieve a large amount of current, a car battery uses thin plates in order to increase its surface area.
A deep cycle battery is designed to provide a steady amount of current over a long period of time. A deep cycle battery can provide a surge when needed, but nothing like the surge a car battery can. A deep cycle battery is also designed to be deeply discharged over and over again (something that would ruin a car battery very quickly). To accomplish this, a deep cycle battery uses thicker plates.
A car battery typically has two ratings:
CCA (Cold Cranking Amps) - The number of amps that the battery can produce at 32 degrees F (0 degrees C) for 30 seconds
RC (Reserve Capacity) - The number of minutes that the battery can deliver 25 amps while keeping its voltage above 10.5 volts
Typically, a deep cycle battery will have two or three times the RC of a car battery, but will deliver one-half or three-quarters the CCAs. In addition, a deep cycle battery can withstand several hundred total discharge/recharge cycles, while a car battery is not designed to be totally discharged.
Why do you want to run dual batteries?
one for starting and one for stereo?.....if yes then it's best to run duals with an shut off switch between them. Lost of threads about that procedure.
one for starting and one for stereo?.....if yes then it's best to run duals with an shut off switch between them. Lost of threads about that procedure.
Sportster-2001-951C-Stock
Well-Known Member
I'd prefer a cranking battery over a deep cycle b/c it's made for a stronger jolt for cranking. If two batteries one can be deep cycle but if two batteries you need to isolate them while resting on trailer.
Deep cycle won't damage MPEM but you might notice less cranking oomph in same size package.
Depends on what you're trying to accomplish.
Sorry, I didn't see it's a Speedster boat, missed that. There's lots of space and the group 24 size deep cycle will give you plenty of cranking oomph for that little seadoo motor. I think the seadoo regulator may not fully charge deep cycle though so you should give it some love with a maintainer after a day on the water.
I tend to stick with cranking batteries though, so I can swap them to my car in a pinch.
Battery physical dimensions:
http://www.batterystuff.com/kb/tools/bci-battery-group-sizes.html
Deep cycle won't damage MPEM but you might notice less cranking oomph in same size package.
Depends on what you're trying to accomplish.
Sorry, I didn't see it's a Speedster boat, missed that. There's lots of space and the group 24 size deep cycle will give you plenty of cranking oomph for that little seadoo motor. I think the seadoo regulator may not fully charge deep cycle though so you should give it some love with a maintainer after a day on the water.
I tend to stick with cranking batteries though, so I can swap them to my car in a pinch.
Battery physical dimensions:
http://www.batterystuff.com/kb/tools/bci-battery-group-sizes.html
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Pretty sure my 99 Speedster came with a deep cycle from the factory. I'm the original owner and tend to not stray too far from how things came from the factory. I've been using Deep cycles in it since then. I have put a straight automotive starting battery in one day (I keep my battery in the house over the winter) to get the boat going and the engines sounded the same when turning over with the deep cycle. I think I'm on my 3rd battery since 99. I'll let you guys dicker over exactly what to put in there.
Sportster-2001-951C-Stock
Well-Known Member
Can't argue with that. Normally as a dealer, we install the batteries at some point before the boat is sold as new.
jetmoto785
New Member
I'm located in sister Lakes Michigan, I just bought this boat doing a full resto on it and wasn't sure about the batteries, the guy I got it from told me it would burn out the mpem running a larger battery.. I didn't understand him because 12v is 12v.. he had a small jet ski type battery in it..
I'm going to run a stereo with dual batteries.. my only concern was destroying a very expensive mpem.. I didn't think it would by going to a deepcycle but just wanted to make sure
yep a battery is a battery thanks for all the help..
I'm going to run a stereo with dual batteries.. my only concern was destroying a very expensive mpem.. I didn't think it would by going to a deepcycle but just wanted to make sure
yep a battery is a battery thanks for all the help..
Here's a thread on an dual battery install in a 98 Speedster
http://www.seadooforum.com/showthread.php?30749-Adding-a-2nd-Battery&highlight=rfoster130
http://www.seadooforum.com/showthread.php?30749-Adding-a-2nd-Battery&highlight=rfoster130
Sportster-2001-951C-Stock
Well-Known Member
Our standard approach for a fully rigged boat with properly installed dual battery switch:
Group 24 marine starting, 1000 mca batteries for engine crank/start
Group 27 marine deep cycle for accessories (not a cranking battery).
Group 24 marine starting, 1000 mca batteries for engine crank/start
Group 27 marine deep cycle for accessories (not a cranking battery).
Waterluvr
New Member
I install Deka 24 series dual purpose cycling / starting batteries in any Sea Doo jet boat I'm working on that needs a battery. There's ample cold cranking amps and it's an asset to boat owners that are using them infrequently with prolonged static cycles of non use they have proven to be the best choice.
The small amount of charging amps produced by the stators seems to be enough to maintain them all season long without the need to disconnect the battery for maintenance charging as I have often found needed with just dedicated 24 series starting battery's used in the same application.
The small amount of charging amps produced by the stators seems to be enough to maintain them all season long without the need to disconnect the battery for maintenance charging as I have often found needed with just dedicated 24 series starting battery's used in the same application.
Sportster-2001-951C-Stock
Well-Known Member
I'm still running 19 year old Motorcraft automotive cranking batteries but I'm pretty sure they're getting tired.
I have no need for a stereo, that's a completely different story. But if I did, it would be powered by a deep cycle.
I have no need for a stereo, that's a completely different story. But if I did, it would be powered by a deep cycle.
Sportster-2001-951C-Stock
Well-Known Member
It cranked my diesel tractor over last week, I pulled down and cut up 7 trees that day.
"Starter batteries and deep-cycle batteries have their unique purposes and cannot be interchanged."
http://batteryuniversity.com/learn/article/advancements_in_lead_acid
"2. Basically there are two types of lead acid batteries (along with 3 sub categories); The two main types are Starting (cranking), and Deep Cycle (marine/golf cart). The starting battery (SLI starting lights ignition) is designed to deliver quick bursts of energy (such as starting engines) and therefore has a greater plate count. The plates are thinner and have somewhat different material composition. The deep cycle battery has less instant energy, but greater long-term energy delivery. Deep cycle batteries have thicker plates and can survive a number of discharge cycles. Starting batteries should not be used for deep cycle applications because the thinner plates are more prone to warping and pitting when discharged. The so-called Dual Purpose Battery is a compromise between the two types of batteries, though it is better to be more specific if possible."
CCA vs MCA, this is important b/c it's a good way for the industry to sell you something that's not quite what you though you were buying:
"Cold cranking amps (CCA) is a measurement of the number of amps a battery can deliver at 0 ° F for 30 seconds and not drop below 7.2 volts. So a high CCA battery rating is especially important in starting battery applications, and in cold weather. This measurement is not particularly important in Deep cycle batteries, though it is the most commonly 'known' battery measurement.
CA is cranking amps measured at 32 degrees F. This rating is also called marine cranking amps (MCA). Hot cranking amps (HCA) is seldom used any longer but is measured at 80 ° F."
http://www.batterystuff.com/kb/articles/battery-articles/battery-basics.html#2
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Sportster-2001-951C-Stock
Well-Known Member
BTW, if that happens to be the twin engine boat with a single MPEM then be very careful with the MPEM b/c they're low production and nearly impossible to find a replacement for.
Sportster-2001-951C-Stock
Well-Known Member
It cranked my crawler tractor over again today! These batteries are for sale BTW, pick up only. Let me know if you want them, I'll chip in for gasoline if you'll bring a motor from Chalfont down this way for me.
http://www.ebay.com/itm/Buick-231-3...D&orig_cvip=true&rt=nc&_trksid=p2047675.l2557
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