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HomeAircraftHelicopterMain Discussion › JR 10x with Li-ion (lithium) pack-Volt reading
04-01-2005 12:37 PM  13 years agoPost 1
mac2047

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Sunny FL

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I bought Li-ion cells on Ebay and packed them (2000 mah) for my 10x. At full charge it is about 12.5v. I am afriad to hook the pack with my TX now. Has anybody used this? Will it dammage the TX? What is the reading on the 10X when you connect the pack and turn on the TX? Can I just solder the old Ni-cad out and just simply connect new pack in there?

Any advice will be appreciated. Anybody with this set up, please post some pictures. The battery pack is really tight for a battery comprtment. I really have to force it into the 10X battery compartment.

Thanks,

Mac

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04-01-2005 12:54 PM  13 years agoPost 2
GM1

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Tallahassee, Florida US

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Well...............
Not sure about a 10X but I run 12.5V in both my 9Z and my 14MZ without issue.
Gordie

On a dog sled team, if you're not the lead dog, the view never changes.

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04-01-2005 02:03 PM  13 years agoPost 3
pdman

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West Chester, PA

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Same here....
I've been running 11.1 V Li-Polys that peak at 12.5V in my 9Z for over 6 months without any problems.

Duralite carries a 11.1V Li-Ion pack for the 10x (Part# 136TX10X). The 11.1V Li-Ion packs also peaks out at 12.5V after a fresh charge.

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04-01-2005 02:57 PM  13 years agoPost 4
Gary

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Crosby, Texas

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mac2047,

I run Duralite lithiums in my 10X's and fully charged they will read approx 12.5 v. Not sure what your batteries are but on the Duralites the stop fly voltage is 10.8 or 10.9 so your trans voltage warning is not going to work. Just make sure you know what the stop fly voltage is before using.

"Who said obsession was a bad thing"

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04-01-2005 07:17 PM  13 years agoPost 5
Colin D.

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Bellevue, WA

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I use a TP 2100 3 cell li-po pack in my 9Z as well -- no issues as of yet. I am curious as well what the stop-fly voltage is? I'm assuming it's the same as the lithium ion batteries. I always charge when it gets down around 11 volts to be safe...

CD

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04-01-2005 07:30 PM  13 years agoPost 6
Gary

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Crosby, Texas

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The problem is when a lithium is run down too low it's shot.

"Who said obsession was a bad thing"

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04-01-2005 08:03 PM  13 years agoPost 7
mac2047

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Sunny FL

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All,

Thank you very much for very informative replies. RR is great.

Gary, what does it mean when you said "The problem is when a lithium is run down too low it's shot." Thanks for advice regarding to teh voltage warning.

Thank you very much,

Mac

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04-01-2005 08:08 PM  13 years agoPost 8
BC Don

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Calgary, AB Canada

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I just went and purchased a second 8 cell nicad (1100MAh) for my 9CHP. Now have the original (plus one from a 7CHP) plus the 1100MAh - that'll more than get me through day and I can recharge at night. In fact, the 1100MAh will last me for one flight day (up to about a dozen flights at 10 to 15 minutes). My Rx gives out before that.

What benefit does LiPo give you?

Got Money? Send it to me, I'm a Heli Addict.

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04-01-2005 08:36 PM  13 years agoPost 9
Gary

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Crosby, Texas

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mac2047,


Simply put, when you run a lithium pak down like you normally would a nicad, they will not come back. It damages the cells. It's like all the new cell phones these days. They are lithium, and when the little bell tells you "low battery", it's not because the battery is dead, it's because they have a preset cutoff voltage not to drop below. Duralite can explain it much better than me, but that's a brief summary of what I got from them when I switched all my stuff over to them.

"Who said obsession was a bad thing"

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04-01-2005 09:43 PM  13 years agoPost 10
mac2047

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Sunny FL

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Gary,

Thanks for clarifying it. My battery pack has PCB which prevents the battery to overcharging and overdischarging. The specs are as follow. I don’t know if PCB would help reducing the damage to the cells. I will see how quickly the voltage drop to make sure that TX is always effective.

Overcharge Protection voltage for single cell: 4.35V +/- 0.025V
Overdischarge Protection voltage for single cell: 2.0V +/-0.08V
Overcurrent detection Protection <= 4.0 A +/-1A
Supply current: MAX 50uA
Short circuit Protection 0 V charge
Protection circuitry Resistance: <= 80m ohms

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04-01-2005 09:51 PM  13 years agoPost 11
cfranks

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Adelaide South Australia

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Gary is correct. I did just that - destroyed a Duralite 1300maH pack in my 10X by leaving the Tx on too long. An expensive lesson. As has been said, the full charge reads 12.5v and has never caused me a problem. The only thing I am not used to yet is that the 'bar graph' voltage indicator never comes off full.

Charles

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04-02-2005 09:11 AM  13 years agoPost 12
ChrisT88

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FL

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Lipoly cells can be run down to 3v per cell or:

3 cells x 3 volts = 9 volts. My 10X alarm goes off at 9v I believe....

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