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Old 07-13-2013, 03:47 PM   #1
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Default I hope this new battery works.

I had a gift certificate from amazon leftover from a raffle that I won, so I thought. What the heck. I need a new battery pretty soon... So....



about 2.5 lbs versus I think closer to 15 lbs for my current battery that is dying.....

We'll see how well it works....

Worse come to worse, I'll return it to amazon if it doesn't work....lol...
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Old 07-13-2013, 06:51 PM   #2
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Good luck with that.....
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Old 07-15-2013, 12:32 AM   #3
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Update... It works! Startup is just fine....

This isn't the final place where I plan on installing it (I needed it out of the trunk to cleanup some rust in the trunk where the old battery was)...

But I temporarily mounted it with a small brace and some zip ties next to the ECU behind the rear passenger seat for the time being....



The Lifepo3 batteries cannot be fully discharged, otherwise the battery is toast. So I plan on adding a cutoff switch that I will shutoff after leaving the car parked to avoid parasitic drains on the battery (in case there are any).


The weight of the new battery is closer to 3 lbs instead of 2.5 (well, that's from how much I weighed holding it on a bathroom scale minus how much I weighed without hold it...)

My old battery was not 15lbs, but....



So I've cut down about 25 lbs...after adding about 40lbs for a rollbar....

Now comes the question of how long the battery will last if I DD the car...

TBD......
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Old 07-15-2013, 12:49 AM   #4
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Should last plenty long as long as you don't ever fully discharge, as you said. 2.5lbs sounds like a 16-cell LiFePO4, which is more than enough to start the car several times. I have a <1.5lb 8-cell version for Theseus, but I plan to always have a jump pack around.

These are available under several brand names - mine is from Ballistic IIRC.
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Old 07-15-2013, 01:01 AM   #5
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Originally Posted by Savington View Post
Should last plenty long as long as you don't ever fully discharge, as you said. 2.5lbs sounds like a 16-cell LiFePO4, which is more than enough to start the car several times. I have a <1.5lb 8-cell version for Theseus, but I plan to always have a jump pack around.

These are available under several brand names - mine is from Ballistic IIRC.
If you don't mind me asking, where did you put the battery? Did you leave it in the trunk, or did you move it elsewhere?

There's some folks that mentioned these batteries shouldn't be placed where there's a lot of heat. And I was slightly concerned since the original location of the battery is right above the exhaust. When I touch the trunk floor pan, it seemed a little toasty.

I was contemplating putting the battery inside the passenger side (maybe near where the glove box use to be, and then re-route the cabling (maybe shortening it)....

Of maybe I'm just worrying too much...

BTW: I miss NorCal. I use to live in Sunnyvale actually pretty close to where the costco is
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Old 07-15-2013, 03:40 AM   #6
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As of tonight, it's sitting on a shelf next to a big pile of other cool parts. My plan is to either bolt it down in the passenger footwell or place it in a box that's attached to the cage somewhere.

There are two kinds of people: Those who miss Norcal, and those who have never had the pleasure of living here
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