So assuming someone like me drives ~3-4 days out of the week and doesn't garage it for more than 2 weeks straight (usually when traveling). Is there any real maintenance? It seems to me I should just drive it like usual and keep a jumpstarter on my car if I wanted to go that route.
For a daily driver, you likely won't need to do much vs. lead acid. Heat is the No.1 killer of batteries of any kind. The battery being in the relatively cool trunk floor will last longer than those that live under hood next to the hot engine.
For me, the price is the turn off. $500-800 for a battery seems high.
When I started looking for one for the Stinger a couple yrs ago, they were $1k+. Some are still rather pricey, but there are ones that have come down into what I consider reasonable territory. Consider the fact that a good H7 AGM battery costs about $250 at most auto parts stores. Premium ones like Optima are $300-350+. A LiFePO4 around $500-$550 isn't that far off.
The weight reduction is the biggest plus. There isn't too many easy/cheap ways to shave 40-50 lbs off the car. Carbon fiber hood is probably the biggest one; it only saves about 20 lbs but costs $1300. Every time we take off the spare wheel/tire, the trunk floor, etc. for a track event, the rear ride height sits a few mm taller... not much but visible difference. It is especially noticeable with the
G70. 40-50 lbs lighter rear end will make a very appreciable difference in handling, especially through the slalom, where you are tossing the car from side to side.
For everyday driving, I doubt most drivers will feel much of a difference. Doesn't mean the difference isn't there, just most drivers likely won't feel it. The Enkei TFRs we have are 10-13lbs lighter than stock wheels. That's HUGE to myself and my son when we hit the track, but oblivious to Mrs. Volfy. That said, for a daily driver, it's not improbable for 40-50 lbs weight reduction to save 1-3% on fuel economy, especially if's city driving with lots of stop-n-go. May not be noticeable at each fill up, but it adds up. Over 100k miles, at say 25mpg and $5/gal, that's roughly $200-$600 savings. That could be even higher if your overall mpg is lower and gas is more expensive in your area.
Obviously, if it's a leased car that won't be around the garage for more than a couple of years, I wouldn't bother. Both our Stinger and
G70 are keepers and so, for me, LiFePO4's are a worthy prospect, all things considered.