Duo3 settings

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Old 08-09-2010, 08:56 PM
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hi.. what would be the best settings on a hyperion duo3 in charging a 4s 5400 50c lipo?? thanks a lot
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Old 08-09-2010, 09:59 PM
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Originally Posted by J-Force View Post
hi.. what would be the best settings on a hyperion duo3 in charging a 4s 5400 50c lipo?? thanks a lot
for what brand of batteries?
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Old 08-09-2010, 10:58 PM
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Originally Posted by Dr freedom View Post
for what brand of batteries?
smc
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Old 08-10-2010, 01:32 AM
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I cant see if they are rated at 2c or not, assuming they are:

solo
5400mah
2c rating
10a charge
55mins safety
3.1 lvc
5.0 discharge (I never discharge anyways)

are you looking to sync charge?
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Old 08-10-2010, 07:00 PM
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nope, not for sync charging.. 10A charge not 5.4A? thanks
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Old 08-10-2010, 07:05 PM
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As he stated, he was assuming you would take advantage of 2C charging if the lipo permitted such.

Your 1C charge rate would be 5.4a.
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Old 08-11-2010, 02:31 AM
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how would i know if my smc permits 2c charging? so 2c charging, if permitted, only means doubling the amp rate ie. from 5.4a to 10.8a? forgive my innocence, newbie to ep. thanks
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Old 08-11-2010, 09:37 AM
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It usually says on the lipo label. I looked on SPCs website and didn't see any mention of 2C or higher charge capability in their SMC lipos.

Its usually an advertising point, so if its not mentioned, its prob only 1C charging. If there's no lable info, assume its 1C.

The reason for 2C or any higher C rate charging is to reduce charging time. Early on for lipos, charge rate was related to lipo cycle life, higher charge rate, the shorter life. They have solved that prob now with the later marketed lipos and charge rate does not to affect lipo life.

Charging time is all a higher charge C rate changes. 2C will cut time by about 1/3. 5C charges take about 12minutes.
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Old 08-11-2010, 09:51 PM
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let me get it right.. a 5400mah pack should be charged 5.4a at 1c, or 10.8a at 2c? or just charge it at 5.4a but make it 2c instead of 1c? thanks
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Old 08-12-2010, 08:35 AM
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The charge C rate is calculated by dividing the lipo capacity in mah by 1000, so for 1C => 5400/1000 = 5.4amps.

2C is just 2x 1C, so 2 x 5.4 = 10.8amps.



The pack can be charged at what the lipo manufacturer recommends it can be charged at. This is usually listed on the lipo label. My Turnigy lipos say 2C charging. My Neuenergy lipos say charge at 1C. Whatever is recommened, that is the max charge rate.


If the label doesn't sayanything about charge rate, its usually assumed that the max is 1C. If you want to be sure, try calling/emailing the lipo manufacturer.
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Old 08-12-2010, 11:32 PM
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thanks so much for the info..
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Old 08-13-2010, 04:54 AM
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Originally Posted by Duster_360 View Post
The charge C rate is calculated by dividing the lipo capacity in mah by 1000, so for 1C => 5400/1000 = 5.4amps.

2C is just 2x 1C, so 2 x 5.4 = 10.8amps

The pack can be charged at what the lipo manufacturer recommends it can be charged at. This is usually listed on the lipo label. My Turnigy lipos say 2C charging. My Neuenergy lipos say charge at 1C. Whatever is recommened, that is the max charge rate.

If the label doesn't say anything about charge rate, its usually assumed that the max is 1C. If you want to be sure, try calling/emailing the lipo manufacturer.
This is good stuff, thanks for posting. I'll be purchasing a Duo charge soon also and would be asking the same thing.

Question, approx. how long would it take to charge a 4S 5400 40C Lipo at 1C vs. the time it would take at 2C?

Also, for those that have a Duo charger, what power supply do you use with it, or how would you determine which power supply is best for the Duo charger?
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Old 08-13-2010, 06:48 PM
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Originally Posted by MulliganAl View Post
....Question, approx. how long would it take to charge a 4S 5400 40C Lipo at 1C vs. the time it would take at 2C?

Also, for those that have a Duo charger, what power supply do you use with it, or how would you determine which power supply is best for the Duo charger?
It takes approx 1hr at 1C to charge. At 2C it cuts the CC part of the charge in half since the current has been doubled. But the CV part now starts from a higher current since it was doubled so 2C will not cut the time in half. Expect something like a 40% reduction in time, so 35, 36min. It depends on how far down the lipo was run too, so its hard to quote a precise time.

Duo3 - I didn't notice until it was pointed out, but Hyperion's manual tells you that to run at full power (180watts per port), charger requires 14.5+v DC input. That means most 13.8v RC oriented PS will not run Duo3 at full power. Hyperion doesn't explain what this means as far as charger power reduction if you supply is not 14.5+v.

Otherwise you need PS with more than about 430watts. It should be a 15v output power supply if you want to run Duo3 at full power. Check the 1st page of the unified manual that cover the Duo3, the table at the bottom of the page -

http://media.hyperion.hk/dn/eos/EOS-...2-MAN-EN46.pdf

AMain's Pro 40 power supply looks like a good choice, but its a 13.8v supply.
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Old 08-13-2010, 07:18 PM
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Originally Posted by Duster_360 View Post
It takes approx 1hr at 1C to charge. At 2C it cuts the CC part of the charge in half since the current has been doubled. But the CV part now starts from a higher current since it was doubled so 2C will not cut the time in half. Expect something like a 40% reduction in time, so 35, 36min. It depends on how far down the lipo was run too, so its hard to quote a precise time.
The big asterisk is that many racers pull their lipo off the charger once the cv portion of the charge kicks in because the cc portion of the charge provides more than enough juice if you're only using the lipo for 6 minute heats and 10 minute mains.

Also, some data suggests that lipos will last longer if you only charge them to 90% - 95%, instead of 100%.

Here's my current charging regimen using an Orion 4S 5100 and a Hyperion EOS 0720i-Net3 Charger:

-The day before a race, I charge the Lipo at 2C with 95% cut-off. 35 minutes.

-In between heats, I charge at 2C and pull the lipo off the charger after cv mode kicks in. 12 minutes.

-After the race day, I store it at 65% capacity. 5 minutes.
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Old 08-13-2010, 07:22 PM
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a few more queries...

what relation/effect has the charger's wattage (180w / port) to the charging?

i'm using Muchmore PS 24A, would you think that is enough for the duo3? i used to charge 2 4s packs at the same time..

also, if the 5400mah 4s 50c pack is being charged at 5.5a but at the rate of 2c instead of 1c, what would be the effect?

thanks so much guys
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