I'd like to share my 2 cents here, of which I hope has some common sense.
Lithium Batteries are a key component of Hybrid and Electric cars - They are always exposed to "parking in heat". If you live in Phoenix, your vehicles Lithium batteries are going to get just as hot as one stored inside the cabin. The minimum warranty on the hybrids Lithium battery is 8years, regardless if you are living in Phoenix or the Arctic.
Lets look at a lead acid battery:
it needs to be stored plugged in 24/7 on a float charger or it will degrade and need replacement within 6 months. If you have it properly pluged in (in a cool dry place on 120v), it will not be with you when you need it. if you fail to maintain a lead acid battery and it becomes damaged, it will not charge and will not help you in a jam if abused.
Lead acid batterys can short and cause fire too.
If you keep lead acid in the vehicle you'll find that lead acid boosters are bulky, heavy, and needs to be stored on the floor in the trunk in almost all cases where it will be subjected to heat and vibration/floping/banging around - this knocks the lead dioxide off the plates, when this happens it destroys that part of the battery instantly. According to Jump-n-Carry's documents the lead acid jump pack, temperatures above 70f (21c) "decrease amperage output". You will need to make a mounting fixture and connect the "in vehicle" DC 12v outlet adapter to ensure any life span.
Lead acid boosters rarely last 4years anyway with the best treatment and are usually >$100
So how does this compare? Lets look at Lithium Ion batteries:
Lithium does not like to be stored on a constant charge, but it is recommended to be recharged every 6months. Fits in the glovebox or console and so is always with you. Can last 2-4 years shelf life with the slowest rate of decay among battery types - but will degrade the overall maximum power available as time passes. BUT it will charge, and will get you out if a jam when you need it if its abused. Even if its one use per charge instead of 20.
Lithium-Ion can short and cause fire too.
Fits in the glove box or console. Can be recharged with the "in vehicle" DC 12v outlet adaptor from the glovebox or console. Very vibration/flop/banging around proof in its case. A randomly polled Lithium Ion Jumper packs instructions say to avoid 149f (65c) and above temps or reduced battery life may result - these temperatures will cause physical harm and scalding to bare human flesh.
Can last 4-10years with proper use. And a good one can be had for <$100
Honestly, for around $60 its not an issue for me to let it to suffer.. they are way more life proof than the old lead acid models.
But to each there own.
With a gas Pacifica battery failure, a replacement battery (or with ESS possibly an additional battery) may get someone back on the road and can be a relatively easy and quick fix if the standard type of battery is available somewhere. If I were told that a battery under warranty was on back order and another battery was available, I would probably buy an available battery that would work and not worry about the prorated part of the battery warranty. It wouldn't take long to spend more than that amount on a rental if a loaner wasn't provided through the dealer or the extended warranty.
for trying to find out the information to replace a battery yourself.
@II Kings 9:20
used a Mopar replacement 730 CCA battery for the main battery in a 2017 gas Pacifica under warranty.
A hybrid Pacifica battery is a different story and there are many other threads for hybrid battery issues.
Thanks for reminding owners to check their manuals.
I saw a caution (not sure if in this forum) about storing these jumpers in hot cars. I don't remember if it is a hazard or it just drains the battery quickly.
This thread from a few years ago has some interesting comments, but they seem to be mostly for small (flashlight) batteries, but one post where someone tested temperatures on a car in the sun for 3 hours was very interesting -- cloth seats - 138 degrees! Anybody leave li ions in car during summer?
This is a chatty article about leaving items in hot cars -- https://www.businessinsider.com/neve...hot-day-2018-8
--- they note that Apple says after 95 degrees, their batteries can permanently degrade. (those of you who keep water bottles in the car, see #3.......)
Anyone have more specific information about safely storing these chargers? I would guess under floor if the Stow & Go seat is up is the best.