lifep04 lead acid drop in replacement

leon.davibe

leon.davibe

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People all seem to want a manual or supplier to tell them their specific device is compatible with a lithium lifep04 battery
no supplier will tell you this

they will happily want to sell you a replacement device


TLDR you can use a lifep04 in any device that had a lead acid battery it can't damage the battery

it is as easy as pie , just connect it you don't have to change anything

Some caveats
UPSs with 7ah batteries
Hard to find the form factor with a bms to meet the load of inverter if load fits you can use it

And 48v systems batteries come in two sizes
16s/51.2v nominal is a perfect fit (either 4*12.8v or a 51.2v pack)
15S /48v nominal not so much (if settings can be changed to it's range you can use it, though i would rather go for 16S for standard overcharge protection at 60v on certain devices as the 16s layout @ 3.75v lands you there)

The voltages of lead acid devices, top bottom float etc all work perfect with lifep04, Thanks to the 3.2v cells that can make up exact matches

a lithium battery
comes with a BMS (battery management system)
that will separate the cell from the charge current/load the moment the upper or lower voltages are hit


it is almost impossible to overcharge/over discharge a lithium battery
as long as you don't bypass the BMS or it fails
or you have a problem battery (badly matched cells)
these items will give problems eventually
irrespective of device you connect it to

Edit
If the device has silly fan controller or algo that doesn't keep the fan running until the battery is fully charged, maybe ad a fan that spins all the time

Some devices charger aren't really engineered to cope with the amps for extended periods of time , and since lithium soaks up charge it may work harder than it would on lead acid

So maybe the extra fan is complulsory
 
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I rather rant to much than to little

To try and cover as many of the nut picking as i can

People are free to ignore it
That's the beauty of the internet

Edit : i don't not even alcohol
So all of that spaghetti is just crap genetic brain wiring , you play the hand you are dealt

I often find missing words or repetitive things in my own posts , after the fact

And often if i read my own **** i think damn was i high cause clearly i got the subject matter but got so triggered/side tracked that i made a mess
Of expressing myself

How my wife lives with me i don't know
 
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leon.davibe said:
nut picking
Click to expand...
I hope that they are pistachios. No nut comes close, they are simply the greatest nuts. Pity that they are only grown in Turkey, home of the karpowerships.
/spits
leon.davibe said:
People are free to ignore it
That's the beauty of the internet
Click to expand...
True. Problem is that your messages are often ignored and they do contain some wisdom.
leon.davibe said:
So all of that spaghetti is just crap genetic brain wiring , you play the hand you are dealt
Click to expand...
I disagree. You need to find a way to organise your thoughts better. You can do it. Don't give up man.
leon.davibe said:
I often find missing words or repetitive things in my own posts , after the fact

And often if i read my own **** i think damn was i high cause clearly i got the subject matter but got so triggered/side tracked that i made a mess
Of expressing myself
Click to expand...
Good. Being honest about an issue is the first step to addressing it
leon.davibe said:
How my wife lives with me i don't know
Click to expand...
Probably for the same reasons that she married you, and I am willing to bet that it wasn't for your writing skills, you hound dog you :sneaky:

You're a nice guy with a lot of very reasonable and well-thought out ideas and suggestions. You are doing yourself a disservice by throwing your hands in the air and saying that you cannot be succinct. Try it, and see the results for yourself.
 
RonSwanson said:
True. Problem is that your messages are often ignored and they do contain some wisdom.
Click to expand...

This sums up Leon's posts for me and exactly what I did. I was curious in the beginning and interested in what he had to say, but then after reading the 10th post where he goes squirreling away typing 17 one liners I just couldn't anymore. Now I just scroll past.... Pity.
 
RonSwanson said:
I hope that they are pistachios. No nut comes close, they are simply the greatest nuts. Pity that they are only grown in Turkey, home of the karpowerships.
/spits

True. Problem is that your messages are often ignored and they do contain some wisdom.

I disagree. You need to find a way to organise your thoughts better. You can do it. Don't give up man.

Good. Being honest about an issue is the first step to addressing it

Probably for the same reasons that she married you, and I am willing to bet that it wasn't for your writing skills, you hound dog you :sneaky:

You're a nice guy with a lot of very reasonable and well-thought out ideas and suggestions. You are doing yourself a disservice by throwing your hands in the air and saying that you cannot be succinct. Try it, and see the results for yourself.
Click to expand...
I do try and amend the way i do it, trying to serve it in a more palatable way

In time i will get there,

think i am always to scared i don't cover enough bases
And what i say is misunderstood, hence why i give too much rather than to little of my thinking

Will trim it down

Feel free to call me on bad expressions
 
leon.davibe said:
I do try and amend the way i do it, trying to serve it in a more palatable way

In time i will get there,

think i am always to scared i don't cover enough bases
And what i say is misunderstood, hence why i give too much rather than to little of my thinking

Will trim it down

Feel free to call me on bad expressions
Click to expand...
Sometimes less is more ;)
 
Can always babysit the first charging session

ie check fan behaviour /heat

Normally the chargers are built to run for hours , so can't imagine a circuit that would not have hit equilibrium temp after hrs

So pretty sure if there is an issue most likely fan logic/time based algo will be the problem which can be solved
 
RonSwanson said:
I hope that they are pistachios. No nut comes close, they are simply the greatest nuts. Pity that they are only grown in Turkey, home of the karpowerships.
/spits
Click to expand...

Iran also grows pistachios. Used to be able to buy them in Cape Town in Century City. The carpet sellers sold cans of them.
 
On the topic of nuts

Moderation and brazil pair extremely well
 
leon.davibe said:
People all seem to want a manual or supplier to tell them their specific device is compatible with a lithium lifep04 battery
no supplier will tell you this

they will happily want to sell you a replacement device


TLDR you can use a lifep04 in any device that had a lead acid battery it can't damage the battery

it is as easy as pie , just connect it you don't have to change anything

Some caveats
UPSs with 7ah batteries
Hard to find the form factor with a bms to meet the load of inverter if load fits you can use it

And 48v systems batteries come in two sizes
16s/51.2v nominal is a perfect fit (either 4*12.8v or a 51.2v pack)
15S /48v nominal not so much (if settings can be changed to it's range you can use it, though i would rather go for 16S for standard overcharge protection at 60v on certain devices as the 16s layout @ 3.75v lands you there)

The voltages of lead acid devices, top bottom float etc all work perfect with lifep04, Thanks to the 3.2v cells that can make up exact matches

a lithium battery
comes with a BMS (battery management system)
that will separate the cell from the charge current/load the moment the upper or lower voltages are hit


it is almost impossible to overcharge/over discharge a lithium battery
as long as you don't bypass the BMS or it fails
or you have a problem battery (badly matched cells)
these items will give problems eventually
irrespective of device you connect it to

Edit
If the device has silly fan controller or algo that doesn't keep the fan running until the battery is fully charged, maybe ad a fan that spins all the time
Click to expand...

We have a BlueNova Mobile LiFePO 13v 22Ah battery connected to the alarm panel. It's been working well so far, 2-3 months now. It trickle charges at about 0.5-0.7amps.

​

 
Mirai said:
We have a BlueNova Mobile LiFePO 13v 22Ah battery connected to the alarm panel. It's been working well so far, 2-3 months now. It trickle charges at about 0.5-0.7amps.

​

Click to expand...
Can naturally from time to time just connect a bigger charger to get it to full again if stages are high, to prevent inching towards empty
 
I see it this way

You can spend money on battery replacements every year or two (dependant on how willing you are to torture yourself )

Or get a lithium

The chances that adding a lifep04 to the mix will pop the device is small

Edit :they charge with same voltages and the bms will protect the battery if charger is out of spec low quality, do the fan edit if babysitting first session reveals fan shutdown or lower speed vs normal acid charging

Sure a device change is cheaper than lifelong regular battery changes

See it as the next battery change's money
 
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Asking can i put a lithium in my device

Is akin to asking can i put a silver calcium battery in my car

Changing the battery in a bm is way more intricate than this and yet people do that without the same homework

And actually more problematic than these
 
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