Eflite 3cell lipo?
11-01-2007, 08:03 PM
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Eflite 3cell lipo?
Hay all,
I bought a 11.4v 3cell.I was checking the lipo with my meter .Black wire with red I get 12.17v Black & blue 7.92v black & yellow 3.88 v
Do these readings look good to you??????????????
Thanks all
I bought a 11.4v 3cell.I was checking the lipo with my meter .Black wire with red I get 12.17v Black & blue 7.92v black & yellow 3.88 v
Do these readings look good to you??????????????
Thanks all
11-02-2007, 10:51 AM
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RE: Eflite 3cell lipo?
I'd check the voltages again (I'm sure you did this already) and then calculate the cell voltage totals.
I get the following from the figures that you posted;
12.17v - 7.92v = 4.24v
7.92v - 3.88v = 4.04v
3.88v = 3.88v
These figures are not good due to the fact that you have a .36v difference between the lowest and highest cell voltages. A difference of more then 0.1v between cells is not good and I recommend that you consider returning the battery due to safety concerns.
I get the following from the figures that you posted;
12.17v - 7.92v = 4.24v
7.92v - 3.88v = 4.04v
3.88v = 3.88v
These figures are not good due to the fact that you have a .36v difference between the lowest and highest cell voltages. A difference of more then 0.1v between cells is not good and I recommend that you consider returning the battery due to safety concerns.
11-02-2007, 10:53 AM
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RE: Eflite 3cell lipo?
yes..
your measuring 1 cell, 2 cell, 3 cell voltages by doing that if thats what you wanted or
you could measure 'each' cell and should be around/within the 3.88 volts per cell like the first cell voltage
you have if they are balanced.
any cell below 3.2 i think is bad but if you havent charged it[with a balance charger] and used it theres no way to really
tell as its not all about the voltage. its how it holds the voltage under a load.
fully charged/balanced they should be between 4.1~4.18 per cell...
the norm is to measure 'each' cell voltage.
your measuring 1 cell, 2 cell, 3 cell voltages by doing that if thats what you wanted or
you could measure 'each' cell and should be around/within the 3.88 volts per cell like the first cell voltage
you have if they are balanced.
any cell below 3.2 i think is bad but if you havent charged it[with a balance charger] and used it theres no way to really
tell as its not all about the voltage. its how it holds the voltage under a load.
fully charged/balanced they should be between 4.1~4.18 per cell...
the norm is to measure 'each' cell voltage.
11-03-2007, 05:23 AM
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RE: Eflite 3cell lipo?
yeah, I would agree with what they said
the 4.24v though is getting pretty high though, you really should only go to 4.2, above 4.3 there is damage. If you take 12.6, or the full voltage, and subtract what the pack has in it 12.17 you end up with .43 divided between 3 cells would give you about 0.14v additional, so if you charged that pack likely the reading you would get is
4.02, 4.16 and 4.36, and the last cell would almost certainly puff on you, might even do worse. So make sure to balance your pack before you charge that one =)
the 4.24v though is getting pretty high though, you really should only go to 4.2, above 4.3 there is damage. If you take 12.6, or the full voltage, and subtract what the pack has in it 12.17 you end up with .43 divided between 3 cells would give you about 0.14v additional, so if you charged that pack likely the reading you would get is
4.02, 4.16 and 4.36, and the last cell would almost certainly puff on you, might even do worse. So make sure to balance your pack before you charge that one =)
11-03-2007, 06:01 PM
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RE: Eflite 3cell lipo?
I should be looking into a balancer/charger.I only have a eflite one that came with my cpp.Can you recemend a good gharger/balancer that can be used with the eflite batteries type plug ends???
11-03-2007, 06:19 PM
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RE: Eflite 3cell lipo?
the equinox balancer works with the stock ends, and you can hook that up to any charger with bananna clip ends, like the triton series or the ICE or something like that if you want a multi-perpose charger
If you want lipo only I would suggest looking at the cellpro 4s from www.fmadirect.com
alot of it really depends on your budget, the cellpro is the cheapest good way to go in a nice high quality charger.
If you want lipo only I would suggest looking at the cellpro 4s from www.fmadirect.com
alot of it really depends on your budget, the cellpro is the cheapest good way to go in a nice high quality charger.
11-04-2007, 08:16 AM
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RE: Eflite 3cell lipo?
Will the cell pro charge 2 and 4 cell as well? I have the cx2 and soon to buy a trex 450. Would like a charger/balancer to work with 2 and 4 cell as well.
Thanks for the info guys.
Rich
Thanks for the info guys.
Rich
11-05-2007, 10:16 PM
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RE: Eflite 3cell lipo?
ORIGINAL: rsking45
I should be looking into a balancer/charger.I only have a eflite one that came with my cpp.Can you recemend a good gharger/balancer that can be used with the eflite batteries type plug ends???
I should be looking into a balancer/charger.I only have a eflite one that came with my cpp.Can you recemend a good gharger/balancer that can be used with the eflite batteries type plug ends???
11-06-2007, 01:35 AM
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RE: Eflite 3cell lipo?
ORIGINAL: bigbore
The E-flite charger that comes with a CPP IS a balancing charger isn't it?
The E-flite charger that comes with a CPP IS a balancing charger isn't it?
11-06-2007, 06:16 AM
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RE: Eflite 3cell lipo?
I use the eflite charger as a main charger.I have gone through alot of batteries using this charger.I am very carefull not to discharge the lipo,as soon as I notice that the heli is loosing power I shut it down, let the lipos cool and plug them in . I bought 2 lipos at the same time had thee same amount of flights and they both quit workijng at the same time.Also had 2 dn power do the same thing. I just bought e 11.4v 3 cell on 10-18 which it the battery in question, and already starting to get short f;ite times.
From the info that mrasmm gave me I am going to get the cell pro4s,but I do have one more ? for ya will the 12v supply cord that comes with the eflite gharger work with the cell pro????????
Thanks all
From the info that mrasmm gave me I am going to get the cell pro4s,but I do have one more ? for ya will the 12v supply cord that comes with the eflite gharger work with the cell pro????????
Thanks all
11-06-2007, 07:03 PM
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RE: Eflite 3cell lipo?
no prob =)
if you charge your packs at something like 0.5c it just might work, but you'll probably want something different. You can get cooler PSU's at walmart that will power it, RS has some, or you can do a conversion on a computer PSU that you have sitting around for basically nothing =)
if you charge your packs at something like 0.5c it just might work, but you'll probably want something different. You can get cooler PSU's at walmart that will power it, RS has some, or you can do a conversion on a computer PSU that you have sitting around for basically nothing =)
11-06-2007, 07:11 PM
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RE: Eflite 3cell lipo?
ORIGINAL: rsking45
I use the eflite charger as a main charger.I have gone through alot of batteries using this charger.I am very carefull not to discharge the lipo,as soon as I notice that the heli is loosing power I shut it down, let the lipos cool and plug them in . I bought 2 lipos at the same time had thee same amount of flights and they both quit workijng at the same time.Also had 2 dn power do the same thing. I just bought e 11.4v 3 cell on 10-18 which it the battery in question, and already starting to get short f;ite times.
From the info that mrasmm gave me I am going to get the cell pro4s,but I do have one more ? for ya will the 12v supply cord that comes with the eflite gharger work with the cell pro????????
Thanks all
I use the eflite charger as a main charger.I have gone through alot of batteries using this charger.I am very carefull not to discharge the lipo,as soon as I notice that the heli is loosing power I shut it down, let the lipos cool and plug them in . I bought 2 lipos at the same time had thee same amount of flights and they both quit workijng at the same time.Also had 2 dn power do the same thing. I just bought e 11.4v 3 cell on 10-18 which it the battery in question, and already starting to get short f;ite times.
From the info that mrasmm gave me I am going to get the cell pro4s,but I do have one more ? for ya will the 12v supply cord that comes with the eflite gharger work with the cell pro????????
Thanks all
If you get a nice charger, you have to supply it good, clean voltage and current for it to do its job correctly. I would recommend a true power supply.
i have the converted computer power supply, works like a charm. Nice, clean, regulated 12v power, for very little $$
Michael
11-06-2007, 09:51 PM
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RE: Eflite 3cell lipo?
Convert a computer power supply??? How do you do that. Would hooking up the charger to a 12v battery to charge the lipo would that considered as clean voltage and current.
As you can tell I dont know squat about electronics.
As you can tell I dont know squat about electronics.
11-07-2007, 01:36 AM
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RE: Eflite 3cell lipo?
yup, about as clean as you can get. You can also hook your car battery charger to the battery that is hooked to the charger, but you can't hook your RC charger straight to the automotive battery charger
here are the details on how to do that mod for the computer PSU
http://www.rcuniverse.com/forum/m_5680951/tm.htm
if you look down a ways you can see some pics of the one I did
you can also check out http://www.marcee.org/Articles/PCPowerSupply.htm
that's the guide I followed when I made mine
here are the details on how to do that mod for the computer PSU
http://www.rcuniverse.com/forum/m_5680951/tm.htm
if you look down a ways you can see some pics of the one I did
you can also check out http://www.marcee.org/Articles/PCPowerSupply.htm
that's the guide I followed when I made mine
11-07-2007, 12:39 PM
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RE: Eflite 3cell lipo?
ORIGINAL: rsking45
Convert a computer power supply??? How do you do that. Would hooking up the charger to a 12v battery to charge the lipo would that considered as clean voltage and current.
As you can tell I dont know squat about electronics.
Convert a computer power supply??? How do you do that. Would hooking up the charger to a 12v battery to charge the lipo would that considered as clean voltage and current.
As you can tell I dont know squat about electronics.
Yellow +12V
Black Ground
Black Ground
Red +5V
11-10-2007, 07:52 AM
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RE: Eflite 3cell lipo?
Hay all,I received my cellpro ,read through the manual and still uclear about a few things.As long as its in the lipo mode it just plud in and let it do its thing and keep an eye on it. The 1st lipo i charged is the battery in question.You guys were right its was way out of balance,it took awhile to balance the pack but the cell are @ 4.2 4.2 4.19.The charger is doing its thing and charging the lipo @.50a, should I leave @ .5o or can that be increased?
The 2 cell lipo is charging now @.25a can this be increased? also when I pluged this battery in the charger went into safe charge.What does that mean.
Any thing else that I should be aware bout?
Thanks for all the help
Rich
The 2 cell lipo is charging now @.25a can this be increased? also when I pluged this battery in the charger went into safe charge.What does that mean.
Any thing else that I should be aware bout?
Thanks for all the help
Rich
11-11-2007, 03:40 AM
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RE: Eflite 3cell lipo?
it'll slow down towards the end of a charge if that's what you are talking about. If that's not what you are talking about, then you may try calling FMA and see what they have to say about it. Good luck!
