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Author Topic: Lippo to Li-Ion  (Read 295 times)

Offline Motorman

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Lippo to Li-Ion
« on: July 15, 2025, 06:18:55 PM »
Looking at the 6S 2600 Mah Li-on battery packs in the classifieds I was wondering, are these a direct plug and play replacement for 6S 2800 mah Lippo batteries.

Thanks,
MM :)
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Online Ken Culbertson

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Re: Lippo to Li-Ion
« Reply #1 on: July 15, 2025, 11:19:24 PM »
In the four that I have in rotation, the one 2600 performs no differently than the three 2800s.

Ken
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Offline Motorman

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Re: Lippo to Li-Ion
« Reply #2 on: July 16, 2025, 01:49:53 PM »
Any setting changes needed other than the charger?
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Online Ken Culbertson

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Re: Lippo to Li-Ion
« Reply #3 on: July 16, 2025, 01:57:50 PM »
Quote from: Motorman on July 16, 2025, 01:49:53 PM
Any setting changes needed other than the charger?
None  The 2600 has enough "head room", the 2800 has more.  I don't make any changes to the charger either.
On my charger a LiIon will charge just fine using the Lipo setting.  I get a slightly smaller charge before it stops but is well over what I need.  Makes it simpler when you have both.

Ken
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Offline Crist Rigotti

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Re: Lippo to Li-Ion
« Reply #4 on: July 16, 2025, 02:51:33 PM »
Ken, OP was asking the difference between 2600mah Li-ion and 2800mah Lipos.  You are comparing 2 Li-ion batteries.
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Online Ken Culbertson

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Re: Lippo to Li-Ion
« Reply #5 on: July 16, 2025, 04:43:56 PM »
Quote from: Crist Rigotti on July 16, 2025, 02:51:33 PM
Ken, OP was asking the difference between 2600mah Li-ion and 2800mah Lipos.  You are comparing 2 Li-ion batteries.
As usual you are exactly right.  The answer is similar.  The LiIon will "sag" a bit sooner than a Lipo but they can be run down considerably more than the Lipo and the timer makes them pretty equal.  The Lipo should be > 20% "head room" where as the LiIon will probably be < 10%.

Ken
 
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Online Howard Rush

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Re: Lippo to Li-Ion
« Reply #6 on: Yesterday at 02:12:23 PM »
Quote from: Motorman on July 16, 2025, 01:49:53 PM
Any setting changes needed other than the charger?

Folks say you should reduce the low-voltage cutoff in the ESC.  Voltage drops more during a flight with a Li-Ion battery than with a LiPo.  This has caused some surprises. Some of us discussed this and decided we didn't want to destroy an airplane to save a battery, so we set the low-voltage cutoff to 2.0V / cell.  Now I'm wondering what will happen with the inevitable second flight on one charge.  Having the airplane flying near stall speed for four minutes is not too cool.  What's the safest cutoff voltage for the airplane?
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Online Howard Rush

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Re: Lippo to Li-Ion
« Reply #7 on: Yesterday at 02:18:10 PM »
Quote from: Motorman on July 15, 2025, 06:18:55 PM
Looking at the 6S 2600 Mah Li-on battery packs in the classifieds I was wondering, are these a direct plug and play replacement for 6S 2800 mah Lippo batteries.

Six Molicel P30Bs replaced Thunder Power 6s 2800s just fine in my 68-oz. (now 67-oz.(BFD)) airplane.
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Online Ken Culbertson

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Re: Lippo to Li-Ion
« Reply #8 on: Yesterday at 05:23:49 PM »
Quote from: Howard Rush on Yesterday at 02:12:23 PM
What is the safest cutoff voltage?
We are using 2.8.

Ken     
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Online Ken Culbertson

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Re: Lippo to Li-Ion
« Reply #9 on: Yesterday at 05:37:21 PM »
 Side note. I landed today after a pattern in about 5mph wind with the timer set to 5:25 min.  The battery checker read an average of 3.45 volts on a 6s 2800 pack and I used an astounding 2718ma for the flight.  It was hot and so was the battery but the flight was normal and strong in the clover.  With a strong overhead boost setting I suspect that I was hitting 3.0 in bursts.  The plane - 60oz, 625sq", BA3514-710, 5.1 laps on 68' lines.

It is time to start making P30b packs. - Ken
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Online Howard Rush

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Re: Lippo to Li-Ion
« Reply #10 on: Today at 12:09:28 AM »
or see Igor about a prop.
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