The concerns about lithium batteries being a fire hazard are dated and more theoretical than actual. The current LiFePO4 type for automotive use are highly stable. I do have a battery disconnect switch which is off when the car is stored, but I've done that on all my hobby cars for the last 40 years. As with most parts, avoid no name brands that are suspiciously low priced.
Strange some people do not read the news papers.
A big car transport vessel is on fire at this moment around the North-Sea. 1 crew member dead and nearly all brought to the Hospital.
When this vessel can not be salved the North of Holland will be in extreme danger for pollution.
2 years ago a car transport vessel sunk south of the Azores including a huge pollution case.
Several ferry companies do not allow electric cars on their vessels anymore.
Both accidents have to do with Lithium Car Batteries, which fire you only get out by dumping the car 72 hours in a container filled with water.
When lithium is not properly charged - the reason for those uncontrolled fires - like with our famous regulators there will be a moment you will regret you bought a Lithium battery.
When CCA - crank-capacity - is the issue.
I have a cheap and simple 40Ah lead-acid AMG - but you can use a smaller one too - when you put a super-capacitor bank parallel to it.
Great extra cranking amps. I have this now for 7 month and it works fantastic especially in wintertime.
Your battery will last 2 times longer and the capacitor bank can be sold by your heirs.
One extra tip : all batteries hate a heated environment - say > 40 C - so take them away from your lube-oil tank.
