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Other › CP Pro Battery Question
09-17-2007 12:10 AM  10 years agoPost 1
poindej

rrNovice

austin, tx

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I have about 20-30 flights on my CP Pro. Each one lasting 5-8 minutes. I have crashed many times and repaired it many times as well. I have never changed out either motor and have flown on the same lipo battery that came with it every flight. I had one flight yesterday. When I charged the battery this morning, I noticed the light on the balance charger went off after about 5 minutes. When I went out to fly today, after about 4 minutes of flying it lost power and fell out of the sky. When I tried to spin up again, it had very little power(not enough to get off). I tried charging it when I got home but the light went off again after about 2 minutes.

My question is: Are 20-30 flights enough for the battery to go bad? Could it possibly be the e-flite balance charger is not charging the battery properly? Any other suggestions as to what might be the problem are welcome. I'm pretty sure it is the battery, but I just wanted to run it by the helpful folks on here.

Gratuitous Picture:

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09-17-2007 12:41 AM  10 years agoPost 2
tryan02

rrProfessor

Canton, Missouri

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the balance charger sucks it could be giving you false readings unfortunately I am using mine on a higher mah pack and plug it in 2 or 3 times just to get a good charge. get a buddy to charge it with a real charger and you may be able to bring it back to life. If you dont know anyone do the 2 or 3 charges back to back thing.

No Really I am the club President!!!

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09-17-2007 12:42 AM  10 years agoPost 3
Gregor99

rrElite Veteran

Western Wa

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I'd be good get the voltage from the indivual cells in the charged and uncharged state. That might give us a better sense of the state of your battery. You might also want to verify your 12v supply is really 12v when the charger is on.

As for battery life, 20 is on the low side, real low. I think it should be close to 300-500 for the cheap LiPos and 1000 for the upper crust Thunder Power and the like LiPos.

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09-17-2007 12:53 AM  10 years agoPost 4
tryan02

rrProfessor

Canton, Missouri

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you would be very lucky to get that kind of life out of Eflite packs and chargers. I got 200 before 2 packs were weak and only flying 6 min and dropping hard at 6 min.. The key is not letting them drop off never fly till it wont lift off again. If you sense any power loss you have flown too long. 6 min would be a max on a 800 mah eflite pack before you need to top it off. As a newbie we all flew our lipos too long and weakened them. Just go on the net and get a new one its always good to have a spare helidirect.com has a good esky pack 1000mah that will work great and cheap.

No Really I am the club President!!!

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09-17-2007 01:03 AM  10 years agoPost 5
tutelar-rc

rrKey Veteran

Nobleton, Ontario - Canada

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I agree with Gregor99:
1. check the voltage on the balance charge lead before you charge the battery (make note of the results) - if the voltage is out by over 0.2 volts, you have an unbalanced condition
2. charge the battery
3. check the voltage on the blance charge lead again. Each cell should read about 4.2 volts (or 4.2, 8.4, 12.6 depending how you hook up the voltmeter)

If the voltage is out by over 0.2 volts it will affect how well the battery takes a charge.

I had a battery in a similar condition - once I started using a true balance charger, I was able to get the cells balanced. I have been using it ever since...about 30 flights and still going.

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09-17-2007 01:22 AM  10 years agoPost 6
tryan02

rrProfessor

Canton, Missouri

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I had a battery in a similar condition - once I started using a true balance charger, I was able to get the cells balanced.
good point the eflite is a passive charger not an active but a balance charger none the less. but like I said any mistreatment of the lipo will kill it not to mention a good crash and a dent in the pack or letting it drop too low. Like gas mileage in a car 2 different people can get different mileage from the same car. I get bad mileage cause I push my packs to death and go buy another one. to me that couple more minutes of flight is worth the havoc to the packs. They are way cheaper than a gallon of nitro.

No Really I am the club President!!!

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09-17-2007 01:51 AM  10 years agoPost 7
astroflyer

rrApprentice

Milford, Nova Scotia, Canada

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As for battery life, 20 is on the low side, real low. I think it should be close to 300-500 for the cheap LiPos and 1000 for the upper crust Thunder Power and the like LiPos.
no flame intended, but you must be spending too much time reading the battery ads.... IMHO 300 cycles on any fast charge battery, lipo, nimh or nicad, is a dream. 1000 is fantasizing....

you can ruin a lipo in a few flights if you run it down too far or push it too hard....sad but true.

a balance charger might bring the pack back, but it's doubtful. sounds like it's been discharged too far every flight.

the eflite charger is not a decent balance charger...it cuts the charge when any cell reaches 4.2 volts I'm told....where the other two cells sit voltage wise is any ones' guess.

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09-17-2007 02:43 AM  10 years agoPost 8
fenderstrat

rrProfessor

Aston,Pa

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If you are in this for the long haul dont bother buying good lipo packs till you have a good charger to go with it...a good charger makes the batts perform better and last much much longer...there are many good chargers out there,I have the CELLPRO4S from FMA for 2-4 cell lipo packs IMHO its the best deal for the money out there.It tells ALL necessary info you need, balances EVERYTIME,and is VERY affordable($75.00)it even has a lipo repair mode.do a search theres plenty of info on it.....theres also the thunderpower,and astro chargers that have good reviews,but I'm not familliar with them.....I never understood how people use those e-flight chargers they tell you NOTHING about whats going on during a charge cycle

Compass helis Support Team
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09-17-2007 03:30 AM  10 years agoPost 9
DoubleTap

rrApprentice

Troy, Michigan - USA

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I used the CP-Pro charger and pack exclusively for a long time... until the charger started giving me a charge error.

Long story short... the charger was dead. I bought a 'real' charger. I charged the battery and everything is fine. I'm still using the original pack that came with the heli.

Like Fender said, the Cellpro is awesome. Personally, I got a Triton2 because I wanted to charge some ni-mh and ni-cd also.

Good luck

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09-24-2007 07:28 PM  10 years agoPost 10
poindej

rrNovice

austin, tx

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Thanks everyone

Thanks everyone for the information. I decided to get a Thunder Power 1010C Charger and a Thunder Power 210V Balancer.

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09-24-2007 11:37 PM  10 years agoPost 11
tutelar-rc

rrKey Veteran

Nobleton, Ontario - Canada

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You will not be disappointed - I have the same setup... batteries stay balanced to within 0.01V!

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09-25-2007 12:57 AM  10 years agoPost 12
poindej

rrNovice

austin, tx

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Yeah, I looked at other brands and realized there are compatability issues with balancers and chargers if you mix and match. Also, I plan on being in this hobby for some time and will switch to Thunder Power batteries here soon, so I figured I'd just go all out Thunder Power. Both the charger and the balancer go up to 10 cells so I'm set for good! Expensive, but definitely worth it in the long run.

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09-25-2007 01:13 AM  10 years agoPost 13
tutelar-rc

rrKey Veteran

Nobleton, Ontario - Canada

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Keep in mind that the stock E-Flite balance connector on the battery will not fit into the TP balancer connector. You will have to buy/make an adapter.

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09-28-2007 02:21 AM  9 years agoPost 14
DoubleTap

rrApprentice

Troy, Michigan - USA

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Just to comment on connectors for the Electrifly setup: Triton 2 charger and Equinox balancer

The Triton charger has banana plugs, the balancer plugs into those and the balancer comes with 2cell and 3cell battery connectors. The 3S connector fits the stock E-flite CP pro battery.

Didn't need to make anything in this case.

They sell 11 different battery adapters separately if you need them for other battery configurations...4S, 5S...

http://www.electrifly.com/chargers/gpmm3160.html

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09-28-2007 01:40 PM  9 years agoPost 15
joehelicopter

rrNovice

matoaca,va

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most likely

One of the balance tap wires has come off the battery---had it happen to all my cppro packs-seems to be caused by electrolysis/corrosion-I have had to resolder all my packs many times-cheap copper wires-----

Joehelicopter

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04-21-2008 03:48 PM  9 years agoPost 16
nitro_joe

rrApprentice

Totowa, NJ

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What Thunder Power packs do you guys recommend? I have looked at a few but they are a little larger and heavier than the stock EFilght 3-cell packs. Will using a heavier pack affect the performance of the CPP?

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04-21-2008 03:55 PM  9 years agoPost 17
fla heli boy

rrKey Veteran

cape coral, florida

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question

whats the deal with the skids in that pic (one of my biggest beefs with the pro) and it also looks like you made a frame swap to bolt up those skids. Supplier, brand etc??? Thanks in advance.

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04-21-2008 04:02 PM  9 years agoPost 18
nitro_joe

rrApprentice

Totowa, NJ

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04-21-2008 05:48 PM  9 years agoPost 19
futuramille

rrVeteran

SC USA

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Depends on what level of performance you are looking for. A TP1320 is larger, yes, but it gives 12 solid minutes of sport flying. A TP910 is 20 grams lighter and better for 3D but only good for 6 - 8 minutes of hard flying. A 730mah is powerful but Flight times are no better than stock but the lifetime of the batter and level of quality is worth the price.

If your learning or simply doing circuits and sport flying, the 1320 is perfect. The longer flight times are exactly what is needed for a learning curve support.

use Deans plugs on the battery and charger.



------------------------------
.....I need more batteries!!!

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04-21-2008 06:40 PM  9 years agoPost 20
nitro_joe

rrApprentice

Totowa, NJ

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Thanks - I'll prob pick up a 1320 on my way home from work tonight.

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