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› Are hobby king Lipo Batteries any good ??
03-12-2012 03:46 AM  6 years agoPost 21
3dgimble

rrKey Veteran

Rochester

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I fly HS when flying hard, and switch between HS while flying some times. I run 12S on my larger birds and notice a big difference in C ratings when moving from dual 20c-25c to 40-65c's. All my testing were done with new packs with proper break in. If you are running Gov. mode with very low HS and doing mild to some wild 3D you wont notice the C's. But switch to HS and you will notice big dif. when doing tic tocs or even just hovering.

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03-12-2012 05:58 AM  6 years agoPost 22
deafheliflyer

rrKey Veteran

Arizona

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Funguy,

Thanks for that post.. Makes sense.. I do flips/loops/rolls and FFF, so for me, probably wont notice much differences.. I dont do much tic tocs or stuff like that.. My mind/hand coordination isnt that good LOL

My logo 400 is running close to 3k headspeed using scorpion and Krontronik 60LV... But not flying that hard.

Crash-Prone and overcoming it!!!

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03-12-2012 06:44 AM  6 years agoPost 23
Shortman

rrKey Veteran

Portland, Oregon

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I just spent 20 minutes typing up a response and clicked off the page.

Basically a more accurate measurement of pack performance is a true discharge test as shown here http://www.rcgroups.com/forums/show...2&postcount=143

or even easier measuring the Li Po's internal resistance with your charger (iCharger 306b, 3010, FMA Powerlab 8 can all do this)...

http://www.rcgroups.com/forums/show...t=ir+calculator

Take your IR per cell and use this calculator

http://www.jj604.com/LiPoTool/

to find your batteries "True C" rating. It's been tested by several individuals with dozens of different packs and retested using actual discharge graphs to verify the calculations. This is a highly effective way to accurately test your packs performance.
I fly HS when flying hard, and switch between HS while flying some times. I run 12S on my larger birds and notice a big difference in C ratings when moving from dual 20c-25c to 40-65c's. All my testing were done with new packs with proper break in. If you are running Gov. mode with very low HS and doing mild to some wild 3D you wont notice the C's. But switch to HS and you will notice big dif. when doing tic tocs or even just hovering.
This is due largely impart because a higher C rating pack (40-65C) should in theory provide a higher per cell voltage under load than the same size/cell count pack of a 20-25C battery. Thus a higher C rated pack will give you more voltage under load which in turn equates to more watts = power.

However, in order for this to be true, the battery actually has to be accurately rated.

Testing my Gens Ace 25C 3800mah 6s packs, I've found through IR testing these packs tend to be at a minimum 25C rated but more accurately using the calculator above rated to 40-45C. Hence why many people feel these packs are under rated.

If your hovering around and only doing FFF, the reality is, your probably not putting the batteries under a high load maneuver such as a tic toc where you will get an amp spike (the pack voltage will drop under load) and the better battery packs will provide more power. If your not loading the heli like this, then yes, a 20C pack or 65C pack can feel like it's giving you the same performance.

The reality is, as you get higher C rated packs, your flight times will decrease if you use the full C rating during an entire flight.

2200mah Pack
Discharge rate - C-Rate -Flight Time
10A...................4.5........13min
20A...................9C..........6.6min
30A..................13.6C.......4.4min
40A..................18.2C.......3.3min
50A..................22.7C.......2.6min

So while C ratings do help, you also have to realize that at some point, there is a happy medium between what your system is going to pull, and what kind of flight times you want.

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03-12-2012 07:01 AM  6 years agoPost 24
Solmanbandit

rrElite Veteran

Tucson , AZ

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I won't buy Zippy and Turnigy anymore. The last zippy's I bought lasted 3 weeks. Turnigy's puff too easy and you can start to see signs of puffing after about 3 weeks. So far my favorite batteries are Sky lipo's and Gens Ace.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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03-12-2012 07:03 AM  6 years agoPost 25
rchelichop

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seeya

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Why gamble if you get a Turnigy or Nanotech? The fact that they come with zip zero zilch warranty is pretty lame if you ask me, even just 60 day warranty is better than what they got. Other brands with a warranty may be double the price sometimes of the Turnigy but if you get one bad battery from Turnigy, then you have just paid double the price of the Turnigy now for just meh packs. Support the ones who will support their product.

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03-12-2012 07:33 AM  6 years agoPost 26
3dgimble

rrKey Veteran

Rochester

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Turnigy's puff too easy and you can start to see signs of puffing after about 3 weeks. So far my favorite batteries are Sky lipo's and Gens Ace.
Lol, yeah, if you are only watching puff, then you should know that Sky, Gens Ace use metal plates on the outside of their packs. They say its to protect the packs from punctures , I went through 8 3K 40c's Sky lipos, 6 or more blues, and a few Gens Aces. Only the blues will puff cuz of no plates. Sky's, and Gens never puffed cuz of the steel plates and tight bandaging they employ on them. They all died except Gens way before my Hobby City packs.
BTW nice research "Shortman"

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03-12-2012 07:40 AM  6 years agoPost 27
deafheliflyer

rrKey Veteran

Arizona

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Shortman..

Thanks for the write up.. Very informative.. Appreciate it.

Michael

Crash-Prone and overcoming it!!!

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03-12-2012 08:08 AM  6 years agoPost 28
Shortman

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Portland, Oregon

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BTW nice research "Shortman"
Shortman..
Thanks for the write up.. Very informative.. Appreciate it.
Michael
Happy to help .

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03-12-2012 01:03 PM  6 years agoPost 29
Richardmid1

rrProfessor

Leeds, England

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Turnigy's do have a warrenty, thats what the warrenty bar code is on them.

If you know how not to puff li-po's this hobby is much cheaper!

Ive had one bad Turnigy out of about 2 dozen, when I say bad I mean one of the cells was out of balance by about 0.4v, sent it back and got a new one!

60% of the time, it works every time!

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03-12-2012 04:15 PM  6 years agoPost 30
rchelichop

rrVeteran

seeya

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The Turnigys 'warranty' is just a DOA warranty for 30 days from what I've seen.

This is my quick comparison.

A turnigy 2650 40C is $40

A Thunder Power 2700 45C is $117

Turnigy comes with a 30 day DOA warranty

Thunder Power 2700 45C comes with a 2 year 50% replacement warranty

If you were to need to replace the battery every 30 days due to defects then this is what they would cost at the end of 2 years:

The Turnigy would cost: $960

The Thunder Power would cost $117

And if you crash a Thunder Power it cost the same to replace as you would be doing if you wrecked a Turnigy.

Its a no brainer, the cheap batteries are not as cheap as everyone thinks. Its like driving around with no insurance hoping nothing will go wrong versus having insurance and piece of mind of a good company backing you. Like I said, why gamble.

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03-12-2012 04:37 PM  6 years agoPost 31
Richardmid1

rrProfessor

Leeds, England

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Turnigy comes with a 30 day DOA warranty
My Turnigy wasn't DOA but they still replaced it. You have to know the signs of a good battery i.e. balance and IR. If its good which 99.9% of the time it will be it will last (again providing you know how to look after a li-po).

If someone is replacing a Turnigy every 30 days then they are doing something drastically wrong and no battery would last.

Finally if the Turnigy costs 40 and the TP costs 117, you are 18.5 up if you wreck a Turnigy battery in a crash, not the same.

If you get 150 cycles out of a Turnigy, you would have to get more than 438 cycles out of the TP (in your example) for it to be worth the extra money. If you had used the 65C TP's in your example you would have to get 600 cycles out of those!

60% of the time, it works every time!

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03-12-2012 04:58 PM  6 years agoPost 32
Solmanbandit

rrElite Veteran

Tucson , AZ

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The Turnigys 'warranty' is just a DOA warranty for 30 days from what I've seen.

This is my quick comparison.

A turnigy 2650 40C is $40

A Thunder Power 2700 45C is $117

Turnigy comes with a 30 day DOA warranty

Thunder Power 2700 45C comes with a 2 year 50% replacement warranty

If you were to need to replace the battery every 30 days due to defects then this is what they would cost at the end of 2 years:
First of all, the chances of a DOA is slim. So your numbers are not accurate. I do know about the metal plates and I've been using the sky lipo's for a while now. They have continued to work great for me and have had no issues. So I think I will pass on the $117 batteries.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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03-12-2012 06:58 PM  6 years agoPost 33
digikas

rrVeteran

London, Ontario, Canada

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Okay so honestly, I dont want to spend a fortune on some thing that is destined to die and to be thrown away, thats the case with lipo, its a long-term disposable item, if ever that makes sense, hehe, so if the skylipo and Gen Ace is working well, am not gonna spend a $ 117 on TP, just to have a piece of mind, well guess what my piece of mind is not to screw my bank account !!!!

Scale life or no life !

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03-12-2012 10:21 PM  6 years agoPost 34
DarkSide41

rrVeteran

Sylacauga Alabama USA

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If you were to need to replace the battery every 30 days due to defects
Wow , WHO DOES THAT ????

What plant manufactors the Thunder Powers ?
Replacing a $117 lipo at 50% off still means they pocket a 30% mark up and are making a killing off you if you replace every 30 days

" The biggest threat to our freedom is not from foreign terrorist , but domestic morons"

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03-12-2012 10:39 PM  6 years agoPost 35
Shortman

rrKey Veteran

Portland, Oregon

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And checking the Li Po batteries IR when they first arrive is a great indicator if you have a bad cell.

You don't even have to run it up or "use" it prior to finding a cell that is not in line with the rest of the cells.

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03-12-2012 11:08 PM  6 years agoPost 36
Richardmid1

rrProfessor

Leeds, England

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And checking the Li Po batteries IR when they first arrive is a great indicator if you have a bad cell.

You don't even have to run it up or "use" it prior to finding a cell that is not in line with the rest of the cells.
This is precisely what I do.

60% of the time, it works every time!

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03-13-2012 06:54 AM  6 years agoPost 37
heli*xion

rrNovice

vegas baby !!!!!

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+ 1 for turnigys..I have a few 5000mah 40c I have been running in my 550 and 600 last 6 months. They do great.

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03-13-2012 06:57 AM  6 years agoPost 38
BladeStrikes

rrElite Veteran

Shelby TWP,Mi

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Never had issues with Turnigys..

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03-13-2012 10:15 PM  6 years agoPost 39
groran

rrApprentice

CALIFORNIA CITY, California

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I've been using their lipos and A123 generics
for years now and never have I had a problem. Usually it's a user problem roasting the batts. I'm sure there are some here that had problems, but I haven't. Shipping, be sure and use the faster ship because the cheaper way, US customs eats up the time sometimes 2 weeks!!

Randy Lafleur

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03-14-2012 06:15 AM  6 years agoPost 40
Solmanbandit

rrElite Veteran

Tucson , AZ

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I don't worry about orders from HK. When it shows up is when it shows up. If I need it that quick, then I will source it somewhere else closer.

Trex 700E / Trex 500 ESP - Ikon/ HD 500 - Ikon 2/ Goblin 500 Ikon 2

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