Replace hybrid 12v battery with LiFePO4 battery?

[jwcolby54]

Has anyone tried replacing the Hybrid 12v lead acid with a Lithium Iron Phosphate battery? Because a LiFePO4 battery can handle being discharged all the way to 10V, and because the battery is no longer a "starter" battery, and because a LiFePO4 battery is good for around 3000 discharge cycles, it seems to me that replacing the regular 12v Lead Acid with LiFePo4 would possibly solve the "dead battery" issue. I just had the dealer replace my battery to the tune of $280, OUCH!

What I am not sure of is the charging voltage when the lead acid 12v battery is being actively charged. If it is at least 13.5 volts (normal for a starter battery is around 14v) then the LiFePO4 would charge all the way up. Eventually. I'm thinking that a 60ah LiFePO4 would be about right.

What do you guys and gals think.

Sponsored

 

[The Real Maverick]

Has anyone tried replacing the Hybrid 12v lead acid with a Lithium Iron Phosphate battery? Because a LiFePO4 battery can handle being discharged all the way to 10V, and because the battery is no longer a "starter" battery, and because a LiFePO4 battery is good for around 3000 discharge cycles, it seems to me that replacing the regular 12v Lead Acid with LiFePo4 would possibly solve the "dead battery" issue. I just had the dealer replace my battery to the tune of $280, OUCH!

What I am not sure of is the charging voltage when the lead acid 12v battery is being actively charged. If it is at least 13.5 volts (normal for a starter battery is around 14v) then the LiFePO4 would charge all the way up. Eventually. I'm thinking that a 60ah LiFePO4 would be about right.

What do you guys and gals think.

Horrible bad idea.

You'll burn your truck to the ground within the first month.

Lithium batteries are very picky / sensitive and require a very specific, very precise charging method, a method your truck does not have.

Bad idea. Don't do it.

 

[MakinDoForNow]

Has anyone tried replacing the Hybrid 12v lead acid with a Lithium Iron Phosphate battery? Because a LiFePO4 battery can handle being discharged all the way to 10V, and because the battery is no longer a "starter" battery, and because a LiFePO4 battery is good for around 3000 discharge cycles, it seems to me that replacing the regular 12v Lead Acid with LiFePo4 would possibly solve the "dead battery" issue. I just had the dealer replace my battery to the tune of $280, OUCH!

What I am not sure of is the charging voltage when the lead acid 12v battery is being actively charged. If it is at least 13.5 volts (normal for a starter battery is around 14v) then the LiFePO4 would charge all the way up. Eventually. I'm thinking that a 60ah LiFePO4 would be about right.

What do you guys and gals think.

Not worth effort. First off 60ah will need to be upsized depending on your climate to handle the necessary internal heat strip in battery. The LiFePO4 generally want 14.4v +/- 0.2v with internal BMS that will shut off charging when internal bat temp drops to 32°F and resume around 40°F. The LiFePO4 will discharge if it's below 0°F, I don't know how low. my buddies trolling motor LiFePO4 is in an insulated blanket and has a built in heater. I regularly see 13.8-15.6v on my maverick power point monitor. So you would need a voltage stabilizer before the positive post possibly a separate BMS from fords? Maybe dealer can reprogram Ford's BMS for your LiFePO4? Maybe best to leave fords battery in system and add the LiFePO4 as backup to power 12v maintainer?

 

[miayyy]

Don't do it!

 

[TheSEARCH]

I fly RC planes and use lipo for that BUT I would NOT on car. I use a special LIPO balance charger. Not what the Mav would do. Go AGM

 

[Ozarkbeard]

WAIT for the recall.

 

[dochawk]

You'll burn your truck to the ground within the first month.

but aside from that, . . .

 

[ZABSMAV]

I fly RC planes and use lipo for that BUT I would NOT on car. I use a special LIPO balance charger. Not what the Mav would do. Go AGM

I agree with another one on here. WAIT for the recall. ANOTHER person on the FaceBook Maverick Hybrid page just posted that he just experienced deep sleep on his 2025 WITH the AGM. That brings to 5 now that I am aware of from 2025 hybrids that have the SAME deep sleep issue, same as ALL the other model years have. AGM batteries ALONE s NOT the solution.

 

[TheSEARCH]

I agree with another one on here. WAIT for the recall. ANOTHER person on the FaceBook Maverick Hybrid page just posted that he just experienced deep sleep on his 2025 WITh the AGM. That brings to 5 now that I am aware of from 2025 hyrbids that have the SAME deep sleep issue as ALL the other model years have. AGM batteries ALONE s NOT the solution.

This is NUTS. I don't get why a reprogramming to charge 12 volt more is that hard. I keep charging my 12 volt once a month now in cold winter months on my 2023 xlt hybrid. ,.I still have the OEM battery. My bet is because I keep charging it so it doesn't fail completely.

Sponsored