A year on duty and my LiFePo4 Antigravity H7 is doing the job.

[XraytecH]

This is very interesting. Due to deep discharge capabilities of the LFP cells (and re-start backup feature), it could conceivably be used as a backup (or minimal use main) house battery for overlanding/camping.

The guys over at AntiGrav "KINDA" discourage doing that cuz some folks might wanna run multiple of these batteries together...

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[remlemasi]

The guys over at AntiGrav "KINDA" discourage doing that cuz some folks might wanna run multiple of these batteries together...

Yeah, I would only use it as a backup to my main house battery in case I deplete it and I need to run the fridge for another day or so.

And I interesting that it says no lead acid chargers and not more than 20A? Is that for the same H7 in your JT? Do the 240A
heavy-duty alternators put out more than 20A to the battery? And don’t they use lead acid charging profiles?

 

[ShadowsPapa]

And I interesting that it says no lead acid chargers

That's true for AGM as well - although technically "lead acid" they require a different charging profile.
My best charger has 3 settings - L/A, AGM and LiFe

Do the 240A
heavy-duty alternators put out more than 20A to the battery?

There's a lot of "it depends" involved. With a very low battery voltage, it could.
Our charging systems will also charge over 14.4 volts, so there is that. Mine will hit 15.0 in cool weather if the batteries are low.

But the LiFe batteries meant to replace AGM batteries have their own internal regulation.

 

[remlemasi]

But the LiFe batteries meant to replace AGM batteries have their own internal regulation

Yes, this is exactly why I am surprised by the warning not to use LA battery charger.

 

[GladiatorPilot23]

Mine just died. No power. Tried to hit the button and remote to jump start and nothing. The Optimate shows a cell issue when I try to charge. Let see how this goes with Antigravity.

 

[remlemasi]

Mine just died. No power. Tried to hit the button and remote to jump start and nothing. The Optimate shows a cell issue when I try to charge. Let see how this goes with Antigravity.

Is normal jump starting allowed with this battery?

 

[XraytecH]

Mine just died. No power. Tried to hit the button and remote to jump start and nothing. The Optimate shows a cell issue when I try to charge. Let see how this goes with Antigravity.

Sorry Man, that's the point of this thread I guess. Take the bullet so someone else doesn't have to.

Keep us up to date.

 

[ShadowsPapa]

Is normal jump starting allowed with this battery?

I have to wonder that as well since jump starting in any means at all is a parallel battery connection and what's it say on the battery? No parallel connections

 

[XraytecH]

Mine just died. No power. Tried to hit the button and remote to jump start and nothing. The Optimate shows a cell issue when I try to charge. Let see how this goes with Antigravity.

Is normal jump starting allowed with this battery?

I have to wonder that as well since jump starting in any means at all is a parallel battery connection and what's it say on the battery? No parallel connections

I'm curious about that too. Before I got my AntiGrav I was running without an Aux Battery. Wonder if that may be the cause.

 

[GladiatorPilot23]

Is normal jump starting allowed with this battery?

Yes, it is allowed, but it has a built-in jump starter, which is that I was referring to. You hit a button and it comes back to life if the battery is good anyway. In this case, it did not come back to life because of an internal issue of some sort.

 

[GladiatorPilot23]

OK, here’s an update. I emailed on Sunday. I called and left a message Monday didn’t hear back so I called again on Tuesday multiple times and got someone.

He told me the update is a little finicky when the battery is at a low state of charge. I checked the vaults with him on the phone and it was 12.3 which it went into sleep mode. I don’t know why my remote didn’t do it, but I didn’t try the button on top because it was covered. Maybe the remote battery is bad but it was new when I put it away. I never used it a year ago.

Anyhow, he told me their new chargers are better at bringing it back to charge again from a low state of charge. I ordered one so let’s see.

My auxiliary battery did come back on the optimate just the bigger main didn’t so far.

I’ll come back and let you guys know if the big one recharged on their charger and see how it’s working. Then I have to figure out how it got drained if that’s the case.

 

[XraytecH]

Interesting...

My guess is your Aux battery is doing what everyone's Aux battery is doing, killing the main battery. Might wanna consider deleting it.

 

[ShadowsPapa]

is doing what everyone's Aux battery is doing, killing the main battery.

Too much internet lore and incorrect info about batteries, even here.

It's not a fact that "everyone's aux battery is killing the main".
In fact, the main can go first, and the aux can go without bothering the main at all.
Or - the main can go and kill the aux.

It may happen but just as easily may not happen.

 

[GladiatorPilot23]

Interesting...

My guess is your Aux battery is doing what everyone's Aux battery is doing, killing the main battery. Might wanna consider deleting it.

I don't think that is the case. It is possible that it happens with lead acid with sulfation as one battery drags down the other. It can go both ways. The main is bad and aux is good and it it pulls down the main or the other way round.

In this case both Antigravity battery's are LifeP04 and no sulfaction. The one thing is once I charge the main with the new charger if it works and volts are 13.25 and higher. Then it's back to normal. That means I would need to see what I left on or how it drained?

 

[ShadowsPapa]

I don't think that is the case. It is possible that it happens with lead acid with sulfation as one battery drags down the other. It can go both ways. The main is bad and aux is good and it it pulls down the main or the other way round.

In this case both Antigravity battery's are LifeP04 and no sulfaction. The one thing is once I charge the main with the new charger if it works and volts are 13.25 and higher. Then it's back to normal. That means I would need to see what I left on or how it drained?

Yes
Besides, I'd never recommend or suggest to mix battery types.
Sounds like you have it well thought out.

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