CCA Requirements? Options

[Literati914]

I'll be picking up a flooded cell lead acid battery soon (budget oriented battery for a rear trunk relocation) and have been leaning towards a group 51R battery. I like this size because they are small - think Mazda Miata, small Honda Civics, Nissan GT-R, IIRC. However, I think the original group 34 had around 700 CCA [is that correct?] and the 51R tends to have a little less (425-/+). The first engine will be a 1.7, but then I'll probably upgrade fairly quickly, possibly before the typical battery dies.

I sort of recall the CCA demand being dependent on the needs of the starter.. or something like that. Anyone know for sure what our starters require, amp wise? And/Or Will the 425 CCA work?

[technicalninja]

Speaking of small batteries, I would like someone to explain how these lithium based 'jump start' kits with a battery the size of cigarette pack will start a car.

Lithium batteries are high energy density. They pack a big punch but not for long.

Lead Acid is low energy density. They don’t hit as hard but they are in it for the long haul.

It’s the difference between energy and power. Energy is the ability to do work. Power is the rate at which the work is done. lithium not as good at doing work over a long period of time (assuming the same current draw on both).

The rest of the details are in the Chemistry.

lithium batteries are not a good choice for day to day street use. Search the forum and you’ll find examples where Lithium batteries don’t have enough Amp-hours of capacity to do a great job where loads are high over extended periods of time.

(IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif) (IMG:style_emoticons/default/agree.gif)
My son Michael was a "Track Monkey" out at MSR. One of his duties was fire control, had to get "certified" and everything...
He HATED lithium fires! Said only way to REALLY put them out was to BURY them!
If a car had a lithium battery catch fire the entire car was lost.
They lost an entire ROW of Garages once to a Li "in garage" fire!

As for the little Jump Packs...
I have an inexpensive NOCO, I've used it 1000+ times in the last ten years...
It has worked SO well I bought them for all of my relatives as gifts. They can sit in a glove box for 9 months and still bounce a car right off!

My NOCO is ten years old and still going like a champ.
I am brand specific on these because of it. It still takes 30-45 mintes to charge it (USB) and it will start 10 normal cars...

FREAKING MAGIC!!!!!!

Ninja approved! (IMG:style_emoticons/default/ninja.gif)