Li-Ion, Li-Manganese difference??

[hookmaker]

Hi,

I have two GREAT Duralite 4300 mAh Li-Ion packs. Now I see that Duralite also has Li-Manganese batteries - what's the difference?

Thanks
/henrik

[DavidH]

Li-Mag

NEW! High Current alternative to Li-Poly

• Non combustable chemistry
• Non flammable if punctured or overcharged
• Highest Discharge - 20c continuous with 40c bursts
• Great low temperature toleranace
• High charge rates up to 10c
• Stay Balance curcuit built into pack - no need for external balancing
• Longer life cycles than li-polymers
• Dual lead system - choice of power output leads/connectors, plus charging lead w/yellow connector

Li-Ion
Rugged - Compact - Reliable

• Lightweight & Powerful - constant voltage to servos
• High Energy Density - Long Cycle Life
• Built in Pack Redundancy - Available In all 4 & 6 Cell Packs
• No Memory & No cycling - Easy to Use
• More Robust than Li-poly's - Cylindrical design can
better withstand impact & vibration of model
• Max Discharge Continuous - 2C
• Dual lead system - choice of power output leads/connectors, plus charging lead w/yellow connector

Look at the discharge rates and you will see one of the main differences.

David

[hookmaker]

David, -thanks for your answer.

Now, I have never gone to "battery school" so please tell me:

1) Is this more a sub for "flight" Li-poly battteries (as in T-Rex 450 etc.) and/or
2) Will I gain significantly by using the Li-Ma battery as Rx battery on a nitro machine over a Li-Ion Rx battery?

KR/Henrik

[DavidH]

Originally Posted by hookmaker

David, -thanks for your answer.

Now, I have never gone to "battery school" so please tell me:

1) Is this more a sub for "flight" Li-poly battteries (as in T-Rex 450 etc.) and/or
2) Will I gain significantly by using the Li-Ma battery as Rx battery on a nitro machine over a Li-Ion Rx battery?

KR/Henrik

Li-Mag does not have the discharge rate of Li-Po I don't believe. So really not a sub for that application I don't believe.

As for using the Li-Mag over Li-Ion as a receiver battery. If your electronics is a high amp current draw setup then yes I would suggest the Li-Mag. For example if all your servos use a lot of power and draw a lot of current. Then I would suggest them, for a 30 or 50 size you would probably be OK with Li-Ion.

David

[spork]

Originally Posted by DavidH

Li-Mag does not have the discharge rate of Li-Po I don't believe. So really not a sub for that application I don't believe.

Your post above says: Highest Discharge - 20c continuous with 40c bursts

That seems as good as some of the better LiPo's. I was (am?) very encouraged by that statement. I was wondering though about the weight of these cells. Any info?

[hookmaker]

Thanks Dave - got it!
/henrik

[Ah Clem]

I just started using one, so I can report back my findings in a couple of weeks.

So far, I have just charged it with my Duralite charger. I flew five flights today with my new Knight 50 (8317's on cyclic, 9256 on tail, 9254 on throttle w/governor).

So far, so good. Watching the way the voltmeter was reading with each flight, I probably could have flown another five times with no problem.


Again, I will post again as I know more.

[Mike Early]

Originally Posted by Ah Clem

I just started using one, so I can report back my findings in a couple of weeks.



Again, I will post again as I know more.

What gives? Wave of the future?

[whisperdancer]

The LiMn sure are heavier than an almost equivalent 20C Lipo.
If I take the FlightPower Evolite 2100mAh v2 (20C), compared to the 20c 2200mAh LiMn, the later weights almost 100gr more!!!