Deep cycle vs starter again

So the question is would a starter battery appreciably charge up faster from the main motor than a deep cycle due to the different make up of these batteries?

Bigger motors with long run times make sense, but what about smaller engines that fish the local lakes and run time isn’t all that long, and even if there is while trolling the rpms are so low the voltage going back to the battery even a factor?

Ive had no issues with my deep cycle for starting, but if I could get away from charging it up as often, which isn’t that often, a starter battery is cheap enough to swap it out.

I guess the main question is what besides the outboard is being powered by that battery? If you have electronics, lighting, aerator, etc all being powered from that battery and you switch to a starting battery I think you will be disappointed.

It’s really more of a general question, but I have a 597 and all boat electrical to it. Never use the bilge, live well is tackle storage, lights arent used to much.

Would that stuff matter though? It’s gonna draw the same small amount of juice no matter the battery, so would a battery that potentially charges quicker from the main make sense? Or it’s just not that much juice from the main to have any noticeable effect?

What year/model motor do you have ? What amp are you charging at ?In a sense a DEEP CYCLE battery should hold charge slightly long if not used to start alot. You may want to switch to a DUAL purpose battery..

First…Check to see what the running output voltage should be coming from your motor while running at an idle….

2nd charge your battery 100% and let it settle for an hour and then have it LOAD tested to see if the charge holds !

3rd…With boat motor running see what kind of voltage you charging system is putting out at an idle then check what output is at a higher RPM….

If steps 1,2 and 3 show that all good MAKE SURE all connections are clean,if positive all are good holler back at me.

JMHO trumar

nhamm wrote:

Would that stuff matter though? It’s gonna draw the same small amount of juice no matter the battery, so would a battery that potentially charges quicker from the main make sense? Or it’s just not that much juice from the main to have any noticeable effect?

yes, it does matter. Starting batteries are designed to take a big load in a short burst (starting an outboard) while a deep cycle is designed to take deep discharges from like a trolling motor or extended use of electronics. I had issues with my electronics turning off when trying to start my outboard. I switched to a dual purpose and no more issues. I think you might run into this problem by going to a starting battery.

My apologies if I made it seem I had issues, I don’t. Charged my deep cycle group 24 couple weeks ago at least, been out several times since and it’s reading about 12.5volts at present.

In general does a starter battery charge faster from the main than a deep cycle, or is the difference a non factor?

nhamm,I understand what you are asking,the problem lays with the amount of amperage your main motor charges at,deep cycle batteries do not tolerate high amp charging very well,( this is if its an acid type deep cycle )

for example,a deep cycle battery gives away its charge at small rates,and likes a charge the same way.
starting motor batteries are built to give up a large amount of amps at a very fast rate,and they can handle high amp short time charges as well.

as stated above,you may want to try a dual purpose battery,if you look up ohms law,you will be able to figure out what load you are placing on your battery,and what your needs truly are,simple math really.

something to think about,ya,two batteries are a big expense,but I know from reading your post’s and replies,you like fishing after dark,do you really want to be stranded because you used your one battery more than you thought????
and yes I know you are going to say yes!!

but storms and wind do come in the night also,something to think about there too.

I don’t believe you will see a change in recharge performance (ie faster recharge) between a deep cycle and starting battery but I think a deep cycle may not last as long since its not designed for those types of loads. I use a dual purpose and while it isn’t as good as a deep cycle for long running items or as good as a starting battery for cranking the big motor but it bridges the gap and performs really well for my needs.
One type charging faster than another? I don’t think you will notice any difference. You are still putting the same amount of amps back into whichever battery you have.
It would be an interesting test to prove out though.