Deep Cycle Battery Mistake, Marine and Dual Purpose - Which to Use
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- Опубліковано 23 сер 2024
- Common Deep Cycle Battery Mistakes
Years ago, I mean years and years ago, a common mistake in purchasing a marine battery (for a boat under 25’) was to chose a deep cycle battery because it was thought that it would hold a charge longer when out on the water.
The problem is that deep cycle batteries are engineered to deliver a steady flow of electricity over a long period of time. Supplying things like lights, radio or an electric frig that draw low constant amounts of electricity. They tend to not deliver the gross amount of amperage all at once compared to a standard ‘Marine Starting’ battery although technology has improved this issue.
The ‘Starting Battery’ is engineered to deliver lots of amperage all at once rather than a little at a time over a longer period. They could also be damaged if drawn down to zero power as opposed to a deep cycle that can usually handle that issue.
The ‘Dual Purpose’ battery in the video is a perfect example of what technology has provided. It can deliver a constant draw of power and yet maintain enough juice to crank over and start an engine. However if one uses too much of that battery there might not be enough left to start the boat.
My solution is to have 2 Dual Purpose batteries on my pontoon boat with a switch to select either battery or both. I always run on battery ‘1’ or ‘2’ alternating between boating days. That way I know both batteries are good because each one gets a chance to start the boat on its own. Plus each one gets charged separately fully on ‘its’ day.
In the past I’ve had 2 batteries charging at once only to find a bad battery took most of the charge leaving the good battery not being charged properly. Running each one separately provides constant proof that it is in good condition.
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Unfortunately this video is incorrect on many levels.. his information on both batteries is not accurate. Deep cycle are meant to draw power for long periods of time but NEVER draw ANY battery to zero. That dual purpose battery does cranking and deep cycle on a medium level but neither extremely well, he kept talking about the dual as cranking only battery..
For marine purposes, get an odyssey extreme (formerly northstar). They have more energy in them than other lead acid batteries in the same group size. They also have the most lead and are the heaviest in a group size you will find.
Hi there, Never fully discharge a deep cycle lead acid battery! The deeper you discharge the battery the more it will reduce the battery's total cycle life.
Yeah that’s what a lot of people say but like you I have never run any of them like totally flattened them out but yeah I got four 100 amp batteries in parallel so yeah have never ever flattened them completely takes to long to charge up but still upgradeing the chargeing system yep yep on the Bremer river Ipswich south east Queensland Australia
The standard claim for deep cycle marine batteries is a discharge down to 50 percent is safe. But they really should not discharge down to less than 60 percent. So don’t discharge below 12.2 volts if possible. This will add several years of life. I live fully off-grid on solar by the way.
Dual purpose and cranking batteries are different, in this video you talked about cranking battery vs deep cycle
As I understand it a dual purpose is both, where cranking isn’t both.
@@MrHardware1 Dual purpose can crank (High Amps) AND deep cycle. BUT you should not drain any of them to Zero. (If you want them to meet or go beyond the advertised cycles)
@@lindilodge Right - 50% is the deepest you'll want to cycle lead. The various lithiums mixes down to about 20%. Nothing down to zero (unless you enjoy replacing expensive batteries).
NEVER. EVER. Discharge ANY Batteries down to ZERO. ESPECIALLY ANY LEAD ACID types. Deep Cycle should be discharged to about 50% for maximum battery life cycles.
Maximum battery cycles would be achieved with lower depth of discharge. 50% is a typical compromise. Never going below 80% state of charge would be far better. If you look at the specs on odyssey batteries, you can get some numbers on how much better it is.
Thank you
So how many volts is 50%? 6v?
Thank you very much for your video it was short but you got straight to the point that I wanted to know and once again a big thank you for your video Australia said that .😊
This guy as no idea what he’s talking about. Never run any LA or AGM battery down past 50%.
They won’t last too long.
By zero, he means 12 volts. If you get your deep cycle to 11 volts or less, you might want to buy a new battery. You can use the one you just messed up as a core return.
Can i use my car battery charger to charge my deep cycle battery for my Trolling motor for my Canoe????
I always have, when you get in the lithium ion is when you have to get fancy chargers.
There's so many things wrong with this video You need to watch a UA-cam video from somebody who really knows. Then remake this one. Deep cycle batteries cannot be rundown past 50%. Dual purpose batteries is simply a deep cycle hybrid that has enough power to start your outboard motor then it'll act as a deep cycle but not as long as a regular deep cycle. Please either fix this video or take it down You're misleading.
seems information is missing here
If deep cycle batteries are better than why don't they just use them for All cars? And are they the best ones to use to power your house
Can anyone answer this question
The deep cycle battery would be the better choice for powering your house because it’s a little bit of draw all the time. Car starting batteries are engineered to deliver a lot of electricity all at once such as turning over the engine of the car. They make dual purpose batteries, that will deliver a lot of power to turn over a car and have the staying power to run low level electronics for a long period of time.
I ask the same question. I've tried using 2 deep cycle batteries one the house and another identical one for starting my Van. I never had any issues starting Van and occasionally would swap from house to starting and vise versa. After years of use and abuse of batteries one of them stopped holding a charge so I thought that maybe because I was using a deep cycle battery for starting Van I may be consuming more gas, but no. There wasn't any difference. So at the end of it all. It's to my belief that they don't make all batteries deep cycle because of their greed for money. I'm going back to having both of my batteries, possibly an extra one piggy backing house battery of deep cycle batteries ONLY. They don't die easily if you happen to leave a light on or something and wakeup with no power. You simply charge them back up and you're good. As opposed to starting batteries if you drain them batteries 2 to 3 times they're shot. Hope I've helped with your question. Take care.
I have used Marine deep cycle batteries for years in my trucks with no problem at all.
Drain to zero? Don’t make battery videos because you misleading people
Rv/marine batteries are designed to use about half of their rated amp hours which would take them down to about 12.1 or 12.2 volts
No, a 12 volt battery should never be 12 volts and after charging on an rv converter they sit at what is called float voltage which is 13.2
My interstate rv/marine battery specifications also state that it should have a finish charge at 15.5 volts for 2 hours
Yes, 15.5 volts. Look it up
Thanks Mr. Hardware
So will the deep cycle start the car . I don't have to run it down a little ...but if I do it won't hurt it. so then would be a better option . If it can start the car.
It should start just fine, it is 12 volts after all. The issue is the deep cycle battery is designed to deliver a low amperage over a long period of time as apposed to delivering a lot of electricity all at once to turn over an engine. Bigger boats have 2 banks of batteries, one to run the appliances and the other to start engines. Both can do the others job although this video explains the difference and why.
If you are starting, get a starting battery -- running a trolling motor, deep cycle. Dual purpose batteries are a compromise that go deep, but tolerate repeated starts. Repeated starts on a deep are NOT what they are designed for, and you WILL shorten their lives by misusing them that way.
Deep cycle batteries should be discharged to about 20% and no lower. They shouldn't be given a "Top off charge". If you don't have a gauge or other way of knowing, cables getting warm or motors and other components running sluggish are indicators of need to charge. Running the battery lower not only damages the battery, it heats and damages the component it's running.
Run down to 20%, then FULLY charge. Check water level after several charges and fill AFTER charging, never before. Only cover the plates, never add extra water.
If the battery sits for too long without being used, it should be checked and possibly charged.
I always fill the cells up to the bottom of the plastic hole. Probably 1/2” or more over the plates.
@@MrHardware1 Too much. 1'4" above the plates. I would tell my customers to only cover the plates as I knew most would do more.
Water above the plates does nothing for getting more charge or needing to fill it less often. Water in battery boils during charging. If filled too high, it leaks from vent holes in the caps and builds up the dry white acid found outside improperly maintained batteries and on the mounting plates and more.
50% for lead. 20% is ok for lithium. Go to 20% on lead, and the life will be vastly shortened.