I'm back to Flooded Lead Acid.

Must have been the red instead of the blue?

Very Interesting indeed!

Within the last couple of weeks there was yet another spontaneous Lithium battery fire news story thus I continue to consider the technology still in it's infancy.. I'll stick with AGM until a time when it's been around a year since seeing this issue repeat itself. I'm interested in switching one day, just not today.

Lithium is an umbrella term, there are many different chemistries with varying degree of fire and safety risks.
The LIFePO4 (Lithium Iron Phosphate) used for RV batteries is among the safest, many people say its safer than lead-acid batteries. The downside is they aren't as energy-dense as the other lithium batteries you see generally catching fire in toys and phones, etc.

https://batteryuniversity.com/learn/article/types_of_lithium_ion

Ray, Thanks for the expanded explanation. I have friends with PO4's and they swear by them thus they remain on my radar. Think I'll let the AGM's proceed to the end of life and decide then. Thanks again.

I saw a video a couple years ago that I can't find now. It showed a team of engineers in China trying to catch LiFePO4 cells on fire by various means that included shooting through the cell with a gun, dead shorting and over charging. In none of these tests did any of the cells catch fire.

they still to expensive.

Since we’re four season campers, from as low as zero in the winter and 100+ in the summer, lithium still presents some challenges that AGM doesn’t. Boy would I be pissed if lithium batteries shut down because it was too hot or too cold outside. For the time being, my two big 4D AGM deep cycles are the way to go for me.

I'd like to see someone do a test with the batteries in a cold climate condition. we probably want account they can't afford to destroy a $700 plus dollar battery.

How cold? The battery spec is that it can be charged between 32 degrees and 113 degrees. It can be discharged down to -4 degrees. If it is colder than 32 degrees the BMS won't allow it to charge but nothing will be destroyed. Don't forget the battery has a long warranty that is not void by using it in cold conditions.

Running a test in climates down to -4 degrees certainly could be performed. (not be me :o) One would expect the battery won't charge due to the BMS unless you warm it first although after discharging it for a while it should warm itself. Also the BMS should halt discharging below -4 degrees.

Auto manufactures face these same issues and incorporate a variety of warming solutions for their electric cars. There are easy strategies for RV's as well but ultimately if you like camping in frozen conditions and you can't keep the battery in a heated space or duct heat to the battery or don't want to use a battery heater than led acid may be the right battery for you. Keep in mind though that in these freezing conditions the led acid battery loses capacity. You will find its performance will be greatly improved as well if you keep it from freezing.

Can only imagine what kind of price point Trojan will come in at for their lithum products...

Their 110 Ah battery is about $1100. They also have a 92 Ah at around $920

Trillium 92ah battery


Here are some comparisons:

Battleborn 100ah $950 $9.50/Ah
Trillium 92Ah $920 $10.00/Ah
Lion 90ah website $999. $11.10/Ah
Lion 90ah LYRV $799. $8.88/Ah

You know I'm ok if you need to use the lithium for weight and space but if not, then like me for example I've had 4-6 volt T-105's now for Five years as of this past march. Show no signs of anything other than a look of a 5 yr old battery. Use then every month at least 20 hrs.and there always drawn down to 70%. Now I paid $ 185 a piece. That's $740 but add taxes. so lets say $825. Now we have 20 hrs times 64 months at 70% DOD. Also I can say without a shadow of a doubt that I've had them down to 20 degs. for a three day stint. Not once but many times. I didn't have to have a heater to warm them neither. Guys don't get me wrong. Lithium is OK if you want storage and weight and space are a factor.Still I am not able to see the any advantage other than that. All I hear from yall are numbers that have been given to you all on a website or manufacturer say so. Ray's set will be a good example to follow. He uses his a lot so we know. Can't wait to see what temps he puts them through this fall and coming winter. Any way guess I've stirred the pot enough again. Oh I know someone whos used his T-105's longer than I and they been in a lot of colder days than us. His are still going too.