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Home✈️Aircraft🚁HelicopterHelicopter Main Discussion › First time lipo user QUESTIONS
08-22-2008 10:42 PM  12 years ago
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jjvwg

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Thornton, CO

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First time lipo user QUESTIONS
I just bought an align 2 in 1 and two kong power packs for my caliber 5. I have already tried out my balancer (blinky balancer) on both battery packs to see how it works. One had enough charge to balance and the other was in the 3.2-3.7 volt range. So both are ready to be charged. I use a triton jr. and all I have to set for charging is the packs voltage and capacity. Is there anything I need to know about charging lipos that the instructions don't say? Since these are new packs how far should I run them down on there first use? I have heard that the first on the first 5 cycles you should only use a certain percentage of the overall capacity. What would this percentage be? The batteries are kong power 7.4V 1800mah 26c receiver packs. Thanks guys.
Jeff
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08-22-2008 11:36 PM  12 years ago
jjvwg

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no one has any tips for me?Jeff
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08-22-2008 11:57 PM  12 years ago
airboss

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OC ,california

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best bet is to not over discharge them and only use about 1/2 capacity.... 900 - 1000 mah. keep them from overheating and always charge at 1 C ....or for 2s 1800, 1.8ampsUrukay HPS3 KSE 700 HPS3
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08-23-2008 12:04 AM  12 years ago
jjvwg

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thanksJeff
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08-23-2008 12:11 AM  12 years ago
Papa Sal

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Reno, Nevada- USA

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I use the Triton2, And i've also learned the hard way. every three- five cycles = ballance. New packs have to be broken in, I learned that you only use half of the total mA of your pack for five flights. So your packs are 1800mA = 900mAs. As close as you can get to that will be fine. Are you just learning? You won't be doing 3-D quite yet so you'll be just fine Have fun, practice, practice, practice."Everything's better inverted"
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08-23-2008 12:14 AM  12 years ago
Papa Sal

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Reno, Nevada- USA

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oh I almost forgot....DON'T leave them unattened. it gives you a chance to pre/post flight your heli."Everything's better inverted"
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08-23-2008 12:41 AM  12 years ago
jjvwg

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Thornton, CO

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how much do you think half the pack would be, a flight or two. I only do FFF and loops, rolls, flips, and have 6v to the servos (digital) and gyro.Jeff
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08-23-2008 12:50 AM  12 years ago
Papa Sal

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3-4mins. each flight and test. Your Triton will tell you how much mAs are going in your packs. Use your timer on your TX. Also if you're doing all that...GREAT JOB. You may want to get bigger packs. I fly 2200ma pks @ 20C 6:47min = 1404mAs. not bad I could fly longer, but I don't want to go over 80% on my packs......yet."Everything's better inverted"
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08-23-2008 02:09 AM  12 years ago
airboss

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OC ,california

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those lipos are expensive and high maintenance so take good care of them. or sell all that E stuff and get a nitro then you can fly the crap out of your heli.Urukay HPS3 KSE 700 HPS3
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08-23-2008 03:02 AM  12 years ago
jjvwg

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Thornton, CO

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sorry i guess you guys didnt understand me, these batteries are for my reciever I have a nitro.Jeff
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08-23-2008 03:50 AM  12 years ago
airboss

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OC ,california

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your right we didnt understand . just charge them at 1 C or 1 x capacity and all will be good.my N9 runs two 2s2500 lipo in parallel.Urukay HPS3 KSE 700 HPS3
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08-23-2008 04:05 AM  12 years ago
jjvwg

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so do i need to break them in or is that just for batteries that power a motor?Jeff
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08-23-2008 07:31 AM  12 years ago
jtg13

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So Cal

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With Kong Power charging at 2C is NO problem if you have a good charger like the Thunder Power 1010C charger or equivalent. You can discharge safely to 20% capacity, but that would be the max discharge you should ever do... best to stay higher than that though. Discharge rate (max amp draw) is not even a consideration when using that pack as a receiver pack since you will never come even close to the max amps that pack is capable of delivering with just a servo load (even if setup as straight voltage to the cyclic servos if using JR8717 servos on cyclic and unregulated through a Spektrum receiver). Best practice would be to fly 2 normal flights and then charge and check the amount of MAH you put back in, this will give you a ball park of discharge per flight (MAH of charge /2). Then try 3 flights if you are well under 50% capacity with 2 flights, as you probably will be, and charge again noting the MAH you put back in to determine the % of charge you are using at 3 flights.

My LiPos will typically support 5 or 6 flights before I reach 20%. But, I always charge after 3 flights just to be safe and because it is so easy to fast charge lipos at the field, and quick at 2C charge. If you read the label on your Kong Power it should say it's safe to charge at 2C. But if you want to charge at 1C or even 1/2C it's no problem... just takes a bit longer. But at 1 or 2C it takes so little time to charge (usually 15 to 30 minutes depending on the charge rate and amount of battery discharge), there's no reason not to charge every 2 or 3 flights just to keep the LiPo topped off.

The key to using LiPos as receiver packs in my opinion, is to never let it get below 20% capacity and to check very carefully after a crash. If you do that they will probably be the best receiver packs you have ever used.
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08-23-2008 12:36 PM  12 years ago
TJinGuy

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Socorro, NM - USA

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Just to point out. If you are going to charge them faster than 1C, you need to charge them with a balancer inline. And there is nothing wrong with 2C charging a pack rated at 15C or higher, it gets them done in about 30min. As for breaking them in, since you are discharging them so slowly as rx packs, don't worry about it. Actually don't worry about most of the LiPo stuff as you are gong to be using the packs so gingerly. Just keep them above 20% capacity and fly. If they were main batteries in an electric heli, they would be used much harder and other things come into play.

Oh yeah and if you crash and damage one, make sure to keep it outside in a open space for 2 hours, where if it bursts into flames it won't hurt anything. The odds of that happening is nearly zero but it is best to be safe. I understand that is you smell Juicy Fruit on the battery, you have a punctured cell and it is definitely bad. Dispose of it properly.
- Chris

Team New Mexico
TJinTech
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08-23-2008 05:17 PM  12 years ago
jjvwg

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Thornton, CO

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thanks for all the input guys, I just have one more question. I am under the impression that there is two different ways to balance the batteries, while charging or after charging. When I charged them for the first time I had the balancer connected to the battery while charging, does it matter if I balance them that way or connect the balancer after it is done charging?Jeff
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08-23-2008 06:09 PM  12 years ago
Papa Sal

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Reno, Nevada- USA

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Use you ballancer to charge, and after 3-5 flights just ballance first before charging. keeps all the cells happy, happy. OBTW sorry I ASSumed that you had an electric heli"Everything's better inverted"
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