Jumping Starter with Deep-Cycle

[Captain Caveman]

I have a starting battery and a deep-cycle in my boat. I've never worn down my own starting battery, but did help a neighbor this spring. Her boat wouldn't turn over. I ran my jumper cables from my deep cycle to her starting battery but realized that it wouldn't work. I then hooked the jumpers up to my starting battery while the engine was running....that did the trick.

That said, how would I use my deep-cycle battery if my own starting battery died? I assume that I wouldn't just run the jumper cables from the good battery (deep) to the bad (starter). Would I unhook the cables from the starter battery and attach them directly to the jumper cables?

How do you jumpstart from a deep cycle?

 

[tx1961whaler]

Re: Jumping Starter with Deep-Cycle

A deep cycle battery will do just fine starting almost any gas motor in warm weather. They normally do not provide quite as high of a cranking current as a starting battery but it is normally quite sufficient to get the job done.
Cranking a motor will not hurt the battery.

 

[Captain Caveman]

Re: Jumping Starter with Deep-Cycle

Yup, so what is the specific procedure?

 

[5150abf]

Re: Jumping Starter with Deep-Cycle

Jumping is jumping, you do it just like you do for any other battery, it is still a 12 volt battery it just says deep cycle on it.

I have 3 batts on mine 2 house and a starter and I have jumper ports by the starter to jump off of the house battery if ever needed.

 

[Bob's Garage]

Re: Jumping Starter with Deep-Cycle

If you have more than 1 battery it makes sense to have a battery selector switch. This enables you to charge both batteries (singularly or together) and to use either one to start the engine(s).

 

[Texasmark]

Re: Jumping Starter with Deep-Cycle

Just hook in parallel, + +,- -. If you use jumper cables and leave them connected for a few minutes, the fresh battery will transfer energy to the stale one and you will not have to rely on the current through the cables for your 100-200 amp starting current. Most of it will be in your cranking battery already and additionally, if you have any concerns about the deep cycle not prividing adequate current, you just got rid of that concern too.

Just ensure that you don't have any gas or hydrogen fumes present because there will be sparks when you connect. Disconnecting not a problem. Hydrogen gas is given off by a battery when being charged so adequate ventilation is a must.

Mark

 

[Howard Sterndrive]

Re: Jumping Starter with Deep-Cycle

red to red, black to block

I have this on board for my own emergencies or others - I don't particularly like jumping from one system to another, and I don't care for voltage drops through perko switches

plus, it can inflate a trailer tire, run AC equipment to 400W, has a USB port, and navigational lights as well as an LED worklight... charges off an ac outlet or boat's alternator, and it stands by in the winter in the trunk of my car

 

[BobGinCO]

Re: Jumping Starter with Deep-Cycle

The Blue Sea Add-A-Battery works quite well to charge both batteries, while keeping you from draining your starting battery. If you somehow drain your starting battery, you can switch the selector to "combine" and then you have the power of BOTH batteries to start your engine. And you have no voltage drops, like you apparently do with Perko switches...