TLDI battery

[rcl700]

I have looked at the tohatsu web page and it recomends the following

Do I need a special battery to start a TLDI??
Because of the additional power requirements needed for a direct injection, TLDI? motors require you to use a marine battery with the following rating:

850 Cold Cranking Amps (CCA)


For users in colder climates, you should use a battery with a rating of:

1000 Cold Cranking Amps (CCA)


Why is it recomending a marine battery?
This is alot of cranking amps for a marine batt.
Would a cranking battery with high CC amps work?

 

[TOHATSU GURU]

Re: TLDI battery

It has to initiate the engines electronics. You do not have to use a marine battery.

 

[pvanv]

Re: TLDI battery

Battery terminology is generally poorly understood by the unsuspecting public. "Marine" may mean nothing, except increased price, and threaded studs for connection to ring-terminated battery cables. Some quality manufacturers do produce better, more shock-resistant cases for the marine batteries, hence the extra cost.

The most common sizes of marine-use batteries are group 24, 27, and 31. These typically have amp-hour ratings of about 75, 100, and 125, respectively. Amp-hours will give you an idea how much total power you can expect to get out of the battery between charges, but doesn't tell the whole story.

The other primary considerations are 1- construction and 2- chemistry.

In "conventional" flooded batteries, the two big categories are "starting" (many thin plates for a lot of cranking amps) and "deep cycle" (fewer, thicker plates for sustained low-amp draw of lights and electronics, but fewer cranking amps). Deep cycle batteries will typically survive a 50% discharge between recharges, while starting batteries usually will not fare well if regularly discharged below 75%.

A TLDI will start best with a "starting" battery, as that type of battery can keep the voltage high enough to fire up the electronics properly while cranking. That's a function of the "cranking amps". "Cold cranking amps" is a lower number than "Marine cranking amps", as the "cold" amps number is rated at a lower temperature.

There are also gel and agm batteries. These don't have flooded cells, and can operate on their sides if needed. They also cost significantly more. AGM batteries are a direct replacement for flooded batteries, as they have about the same voltage charge profiles. The gel batteries have a considerably different charging profile, and can easily be damaged by over-charging. AGM starting batteries also work well for TLDI starting.