Lifepo4 batteries, OK to live with for lazy people?

So the battery in my Datsun vintage race car needs replacing and I'm considering going to a liefpo4 battery. Current battery is the tiny Civic / Miata size one but at 25lbs it's an easy place to shed some weight. The car runs a 1200cc engine at 10-1 compression so it doesn't need huge cranking power.

I've read all the posts from the previous years but there doesn't seem to be a consensus.

The catch is I'm lazy; I don't keep the car on a tender (has a master kill switch) and I only run the car 6-7 times a year. Normally I charge the battery the weekend before an event.

Additinally I have a standard battery charger, I do have one of those lightweight jumper packs if that matters.

So are my lazy habits going to kill off a wazoo $200 battery?

Great news for you!  Lithium batteries should never be left on a charger and they don't self discharge.

In your case, flip off the master kill switch and DON'T charge it before a race and you should be good.

One of the best things about the LiPO4 batteries is that they can be treated like a lead-acid battery.  Charging and discharging the same.  Pretty cool.

But the best of the best thing about them is that they don't have the fire risk that other Li batteries have.

What isn't great is that they don't like heat much.  

If you really want to save some big buck, you could look into making your own LiPO4 battery out of smaller cells.  

That's about the ideal use for a LiFePO4 battery. You can get away with a $40 Zippy if you mount it six inches from the starter. 

It'll be virtually useless below freezing. I had to turn the headlights on for a minute before starting my car in cold weather just to get the battery warm. For life extension, bring it inside. It's about the size of two packs of cards. 

As all the tracks I race on are in the  Mojave Desert, I can't remember the last time the temps at the track have ever been below freezing. On rare occasions the temp goes below 40. Tomorrow the high will be 67 degrees.

The only worry with them is draining them flat. They don't like that, and a surprising number of cars have some sort of small drain that will kill them much faster than a lead acid battery. If the battery is well and truly off which it should be in a vintage car with a kill switch, you're golden.