LiMn vs LiPo

[coolhandcountry]

I was wondering what the difference is between the two.
I got some limn batts and was wondering if they are truely better than lipo.
I was told they are safer. I don't kow for sure.
I got to run them today. I like what I saw. I will have further testing of these batts.
What are the pros and cons of both?

[Tom F]

I'm not entirely sure - the way you look after tham is the same etc...

I was speaking to the guy from PFM about them - i believe they hold a higher volateg under load.

Will have some on the way shortly so...

[MetalMan]

There isn't a huge difference between them and Lipo. The main difference is that they are more safe, but they have more weight because of this. Otherwise, I'd doubt that the voltage/amp handling would be much different.

[coolhandcountry]

What does it mean though by safer? Is it less likely to puff and flame.
I guess I should have asked question before I bought them not after.
They still lighter than my 18 nimhs by pretty good bit. I think they are real close to the lipo if you match the c ratings up to. I remember you talking about these once before metal man. Thanks for the info to. You like a lithium guru.

[Serum]

That he is Leroy, A true lipo Guru! it's always nice to have Metalman's knowledge around!

I presumed the limn to be less catchy for fire than the lipo's

[crazyjr]

Thats what i read about them

[MetalMan]

Yeah, they are what you could call more "tolerant". It probably has something to do with the Manganese being using for the anode/cathode or something like that.

Another Lipo company can also claim fire-safe Lipos. That company is KOKAM. Their cells can take a beating, like 18v charge for a single cell before catching fire! However, their weight compared to other similar-performing Lipos is greater.

[coolhandcountry]

Well more tolerant is good. I try not to abuse my batts but so much. I see what happens. I could use a balancer for them. Thanks for the replies to.

I'm loving my personal Li-Mn set up. In an E-maxx 2x 3s just flys! As for the safety issue, they are much safer because they are more tolerant to overcharging and being overdrawn. The main way Lipos blow is not from being over-discharged like everyone thinks, but from being over-charged. There is also a bit more voltage under load, which anyone can appreciate! I've been selling the Li-mns for a while now, and have had nothing but happy customers!

[MetalMan]

Alex, Lipo damage comes from both overdischarge and overcharge. The main thing that causes this (when a LVC is used) is battery imbalance. If the capacity of one cell is 5% less than another, then that cell will decrease in voltage considerably more than the higher capacity cell at the end of the discharge because it doesn't have enough energy left.
The same is true for overdischarge. If a pack is out of balance, one cell can be charged to a higher voltage than the other, which can cause it to become unstable and puff up.

[coolhandcountry]

Could some one point me to a balancer for my limns? I don't want it to be puffing up on me. That sounds bad really bad. I don't know what kind of balancer plug it has. I can take a pic if necessary.

It has the Apogee plug on it - The people over at Apogee have told me that it isn't really necessary to balance Li-Mns...

[coolhandcountry]

I may get a tester and see what the difference of them are. If they get to far I may look into one. So I need to use an apoggee balancer alex.

[MetalMan]

Originally Posted by Alex Berman

It has the Apogee plug on it - The people over at Apogee have told me that it isn't really necessary to balance Li-Mns...

The only reason why you wouldn't need to balance is if they match the cells in the pack perfectly before assembling the pack. By matching the cells, I mean by IR and capacity.

A balancer never hurt anything, only helped. I don't know what Apogee balance connectors are compatible with, but if they are the same as the Hyperion/Polyquest connectors, then you can a Hyperion LBA6.

Coolhand - I can get you an Apogee one with my next order from them - should be pretty soon.