LifePo4 waiting game

[Vanburi]

Good to know, still too low for an engine bay.

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[LVLAaron]

I'll save you some time. You do not want a lifepo4 battery as a starter battery.

 

[YBABRAT]

I'll save you some time. You do not want a lifepo4 battery as a starter battery.

There are hemi challengers out here with them. No issues from what I gather. Arc Angel and Antigravity are direct drop-ins.

 

[THAW]

There are hemi challengers out here with them. No issues from what I gather. Arc Angel and Antigravity are direct drop-ins.

The Charger/Challenger battery is in the trunk, protected from engine bay heat.

 

[Ratbert]

I'm wondering what happens when you can't keep it above 32F while driving across I-80 in Wyoming. The battery eventually dies, right? Maybe you count on the engine bay keeping it warm enough?

 

[YBABRAT]

The Charger battery is in the trunk, protected from engine bay heat.

Oh, did not know about that.... Dakota states LTO starter battery is made for extreme weather. Was going to try it out but there is not much on its specs.

 

[YBABRAT]

I'm wondering what happens when you can't keep it above 32F while driving across I-80 in Wyoming. The battery eventually dies, right? Maybe you count on the engine bay keeping it warm enough?

Best LifePo4 batteries will limit charge but still perform until -40°C. Though there is one made for extreme cold with a heater to allow charging and operation below -12°F. I lost the link and unable to find it. I did reply to an older thread a few months back about the battery but unable to find it as well.

 

[Ratbert]

Best LifePo4 batteries will limit charge but still perform until -40°C. Though there is one made for extreme cold with a heater to allow charging and operation below -12°F. I lost the link and unable to find it. I did reply to an older thread a few months back about the battery but unable to find it as well.

My understanding is the lithium ions can't embed themselves into the anode and instead turn into a layer of metal plate when you try to charge them below 0C . That severely trashes the battery.

I'm guessing you'd have to have a heater on it, which batteries from companies like Antigravity don't seem to have...or at least I couldn't find one other than DIY approaches.

 

[YBABRAT]

My understanding is the lithium ions can't embed themselves into the anode and instead turn into a layer of metal plate when you try to charge them below 0C . That severely trashes the battery.

I'm guessing you'd have to have a heater on it, which batteries from companies like Antigravity don't seem to have...or at least I couldn't find one other than DIY approaches.

My primary was built-in heater. My lost link killed my endeavor. No other battery is made like it. Another thing was it did not state a reserve jump start... which means it has the rated CCA 100% of the time. I cannot believe I lost the link. Geeze

 

[Ratbert]

My primary was built-in heater. My lost link killed my endeavor. No other battery is made like it. Another thing was it did not state a reserve jump start... which means it has the rated CCA 100% of the time. I cannot believe I lost the link. Geeze

Having a reserve jump start is awesome for starting it. I was more thinking about what happens when you're driving down the road and it's too cold for the battery to accept anything from the alternator. Everything electrical will simply drain the life out of it until it's gone.

 

[LVLAaron]

Having a reserve jump start is awesome for starting it. I was more thinking about what happens when you're driving down the road and it's too cold for the battery to accept anything from the alternator. Everything electrical will simply drain the life out of it until it's gone.

You'd need one with a built in heater.

Personally I like that lead acid is simple and doesn't have electronics that can die. Especially in extremely high amperage situations like these.

 

[Ratbert]

You'd need one with a built in heater.

Agreed, yet it seems to be challenging to find companies that make them for automotive starter applications that have heaters.

 

[YBABRAT]

Having a reserve jump start is awesome for starting it. I was more thinking about what happens when you're driving down the road and it's too cold for the battery to accept anything from the alternator. Everything electrical will simply drain the life out of it until it's gone.

You are thinking lead acid... lithium does not loose power when cold. No need for reserve. The issue I see is dual purpose having no automatic means to switch to high current. Lithium self discharge rate is effected by the type of electronics to allow high current. The internernal circuitry is robust and will bleed some energy like our Jeeps when off and sitting. If you look at good starter lithium batteries they range from 1% to 3% self discharge rates per month. It's the only way to know you are getting full CCA with starting without need to switch circuitry.

 

[Ratbert]

You are thinking lead acid... lithium does not loose power when cold. No need for reserve. The issue I see is dual purpose having no automatic means to switch to high current. Lithium self discharge rate is effected by the type of electronics to allow high current. The internernal circuitry is robust and will bleed some energy like our Jeeps when off and sitting. If you look at good starter lithium batteries they range from 1% to 3% self discharge rates per month. It's the only way to know you are getting full CCA with starting without need to switch circuitry.

Any battery will lose power while being used while driving, right?

 

[YBABRAT]

Any battery will lose power while being used while driving, right?

As long as a top charge is properly maintained, a battery should extend its life not deplete it. What lowers the life of batteries is cycling from depleted states. LifePo4 is more immune to such damage from heavy depletion. Also flood acid takes hours to charge from a heavy cycle, AGM around 30 minutes to recover. LifePo4 can be 15 minutes to 2 hours depending on depletion state on a cycle.

Not all LifePo4 batteries can use a standard 12v car charging system. I am only looking at the few that can drop right in and be 100% compatible.

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