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 News  HV lipos?
03-19-2015 12:59 AM  3 years agoPost 1
rcflyerheli

rrKey Veteran

Granbury, TX USA

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I was just reading on the Revoletrix website about a supposedly new battery that they advertise they are exclusively distributing that is advertised as a "HV" lipo that is 4.35v at full charge and a 70c rating with a 140c burst.

Has anybody seen or tried these packs. It seems that they are too good to be true, and we all know how that works out. I didn't see an ad for 5000mah, just 4800 or 5500 sized packs. Best of all, a 4800, 70c pack listed for something like $120, with a weight of 780g.

Can it be real?

Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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03-20-2015 04:17 PM  3 years agoPost 2
hemp

rrApprentice

Portland, OR - US

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Can it be real?
The HV packs are quite real and easily the highest quality packs I've used. I've been running them for over a year.

There are some inaccuracies in your post, however, which I can clear up.

What is currently out for high output use are the Silver HV 70C packs which can be charged up to 4.27v per cell. Those are the ones that have been out for a year. They just recently released their Black Label (30C) and Platinum Label (40C) packs in a 4.35v chemistry. Those are intended for long-life, rather than high output. Diamond (60C) or Silver Label (70C) packs will be coming in 4.35v configuration, but they need more testing first.

I run the 5500mAh 70C Silver HV 6S packs in my Logo 700 Xxtreme and Logo 550sx. In my 690sx I run 4800mAh Silver HV 6S packs.

Revolectrix prices are awesome. Sometimes almost too low to believe when they run sales. They can do it because John Grzan controls the entire manufacturing process from setting up the lines at the factory to shipping the finalized packs. And not only are they low priced and among the highest quality in the industry, they're also made fresh to order. If you buy direct from the Singapore online store (which I recommend) at revolectrix.com, your name and the date of manufacture will be printed on the label - along with a color changing temperature gauge, and they will be shipped out within a few days of ordering. Also if you want them customized (different gauge or length of wire, for instance) just let them know and they can likely accommodate requests.

The other reason their prices are so low is because they spend very little on marketing. Which is why I consider Revolectrix LiPOs the best kept secret in RC -- but I'm doing my part to get the word out!

If you do order, use coupon code SHAW15 to chop another 10% off the price.


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03-20-2015 05:34 PM  3 years agoPost 3
Chris.C

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Hong Kong

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I got 2 5500mAh, 6S packs, 4.27V fully charged, forgot what label was it, only that these packs can only be charged at 2C.

After I updated my PL8 firmware, it has 4.27 and 4.35v profile set up for these Hv packs.

Thanks for the discount code.

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03-20-2015 09:45 PM  3 years agoPost 4
hemp

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Portland, OR - US

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forgot what label was it, only that these packs can only be charged at 2C
It's ok to charge them higher than 2C, that's just the recommendation for longest life. Early on 1C-2C was stated as a restriction because further testing was needed.

I've been charging my 70C 5500s at 3C for 170+ hard cycles. They're just now starting to show signs of fatigue.
.
WORLD FIRST HV SERIES LIPO. 70C Continuous Discharge rate. 3C Charge rate. 6 months warantee.
via http://www.store.revolectrix.com/Pr.../LiPo-Batteries


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03-20-2015 10:30 PM  3 years agoPost 5
rcflyerheli

rrKey Veteran

Granbury, TX USA

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After I updated my PL8 firmware, it has 4.27 and 4.35v profile set up for these Hv packs.
What's the latest firmware for the PL8?

Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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03-21-2015 12:40 AM  3 years agoPost 6
Chris.C

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Hong Kong

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PL8 firmware version should be 3.32 if I remember correctly.

In there you can find 2 profiles, one call "Blend427" and the other one call "Blend 435".

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03-21-2015 03:27 AM  3 years agoPost 7
rcflyerheli

rrKey Veteran

Granbury, TX USA

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I just did the 3.32 firmware upgrade and did not see those choices in the preset library. I did a google search on that and see that apparently the dual PL will show this, but mine is only a single and apparently the 3.32 update for it does not include the presets.

I know that there should be a way to set up a user defined preset, but I haven't been able to figure it out.

Logo 700, Specter 700, Goblin 700, Trex 700DFC, Gaui X7, Logo 690SX, Logo 600SX; Trex 470 Trex 500
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03-21-2015 01:11 PM  3 years agoPost 8
Dan Minick

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Columbus, WI

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So, what kind of flights times are you achieving with these packs as compared to regular lipo? 1 min longer? 15 sec longer? curious

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-21-2015 08:43 PM  3 years agoPost 9
hemp

rrApprentice

Portland, OR - US

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So, what kind of flights times are you achieving with these packs as compared to regular lipo? 1 min longer? 15 sec longer?
I haven't been using the SilverHV packs for longer flight time, but rather for more power. My typical flying style isn't conducive to long flight times.

The new 4.35v packs are more likely to produce a noticeable flight time difference but I haven't had an opportunity to try them yet.

.
I just did the 3.32 firmware upgrade and did not see those choices in the preset library.
The new HV presets aren't in the Library.

With an open preset selected, go to the File menu and select FMA Default Presets. Then select Open File to Preset #. The new presets are in the LiHV folder that will come up.


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03-22-2015 02:16 AM  3 years agoPost 10
Dan Minick

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Columbus, WI

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Am I wrong in the assumption you would typically not notice a power difference?

If you have a motor with "X"kv governed to "X" head speed you should really not notice a power difference but rather just maintain head speed longer.

You really never use the top 20% of your available head speed(i.e. voltage) I don't understand how the extra few hundredths of a volt would make a power difference. I see it more as the extra capacity should get you a little more time before your cutoff enables.

Maybe I am wrong, looking for someone with actual experience for a true unbiased opinion

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-22-2015 04:25 AM  3 years agoPost 11
Chris.C

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Hong Kong

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I am using the 4.27v hv pack. My Kosmik was set at mode 4 but I did not notice any rpm increase just flight time is a bit longer.

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03-22-2015 04:10 PM  3 years agoPost 12
Dan Minick

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Columbus, WI

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Thanks Chris, that's the type of stuff I am looking for

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-23-2015 03:20 AM  3 years agoPost 13
hemp

rrApprentice

Portland, OR - US

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If you have a motor with "X"kv governed to "X" head speed you should really not notice a power difference but rather just maintain head speed longer.
Apparently you've never bogged a motor? Fly with me sometime and I'll demonstrate extreme power draws with a governed head speed.

It's not unusual for me to log continuous peaks over 200A on my 700 Xxtreme. Regardless of the C ratings on the packs, that's a lot to ask approaching the end of a flight. The HV packs have lower IR and are better able to sustain those loads, plus starting out with slightly higher voltage means fewer amps drawn to meet the power demand early on.

So I still only get 3-4 minutes out of a flight. But with the HV packs I'm less likely to have to back off near the end because they're better able to keep up with me.

Revolectrix makes both regular and HV packs, and I've flown and recommended both, so I may be brand biased but I'm not artificially biased toward high voltage. John has never encouraged us to push one type of battery over another, in case anyone was wondering. And I don't think you can go wrong with either.

But I do know that the Silver HV packs in my experience have lower starting IR and higher power output. Personally I would be skeptical of claims of noticeably longer flight times unless they're being used in low power applications. Of course I'm happy to be proven wrong.


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03-23-2015 12:34 PM  3 years agoPost 14
Dan Minick

rrKey Veteran

Columbus, WI

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Fly with me sometime and I'll demonstrate extreme power draws with a governed head speed
No offence, but anyone can do this. I am typically flying fuel power helicopters (because you need something to do while charging packs right?) but have had many electric as well. I know all about bogging a rotor.

I am not saying your claims are false, just looking for reasoning to back them up. Then asking some real life people who have bought these packs what their opinion is.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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03-23-2015 08:32 PM  3 years agoPost 15
Gregor99

rrElite Veteran

Western Wa

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Am I wrong in the assumption you would typically not notice a power difference?
Even with a correctly setup governor, pack voltage still plays a role. As an example, using regular LiPos in good condition, fresh off the charger, see if you notice that the model feels different during the first 10-20 seconds of the flight. This is when LiPo voltage is at its highest. This peak voltage goes away rather quickly and the pack settles into lower voltage through the rest of the flight.

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03-23-2015 10:07 PM  3 years agoPost 16
hemp

rrApprentice

Portland, OR - US

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Then asking some real life people who have bought these packs what their opinion is.
I'm struggling to understand why I'm not a real life person? Did I fail a Turing Test?
No offence, but anyone can do this.
No offense taken. The difference is whether one can do it and whether one normally does it. It is not unusual for me to bog the motor half a dozen times in a flight and overheat an ESC before the batteries have run out.

You questioned my statement that the extra voltage impacts power more than flight time. I've provided one specific anecdotal example. Of course I'd love to hear more examples from others who have different flying styles.

If you look just at the capacity of the pack, say comparing a 5000mAh Diamond Label pack with a 5500mAh Silver HV pack, it's clear that if the label is accurate, you will get up to 500mAh more capacity out of the latter. How much extra flight time is that? If the flight would have been 5 minutes at 5Ah, adding 10% capacity makes it 5m30s. The best possible theoretical case is lower because there's extra weight (9g) in that 5.5Ah pack that requires energy to move. And we know that reality is never as good as theory.

So it's possible you might get longer flight times, but not significantly by my definition of significant. Therefore I feel the Silver HV packs are better applied to providing and sustaining power than they are for increasing flight times.

The new 4.35v blends out now and the 4.55v blend yet to come - those are more likely to produce a noticeable flight time improvement because of the larger increase in energy density (more capacity for the same weight).

I hope that helps. I'm not trying to be argumentative or sell one pack over another. I have more experience with these Silver HV packs than most people as I was an early adopter, so I'm just trying to share what I know and mix in what I've experienced personally.


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03-24-2015 03:37 AM  3 years agoPost 17
Dan Minick

rrKey Veteran

Columbus, WI

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I'm struggling to understand why I'm not a real life person? Did I fail a Turing Test?
No No, just looking for a collective opinion. Or a few reps chiming in with the same opinions. I am perfectly happy with my Thunder Power packs. But if there truly is something better I would take a closer look next purchasing round.

Team Synergy, Team FBL Rotors-------if its not broke...it will be!

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09-25-2015 11:07 PM  3 years agoPost 18
Charlie R

rrApprentice

Lafayette Ca

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Icharger 406
I bought a Icharger 406 duo a while back . I just got some new HV Hyperion packs and would like to fully charge them to there max voltage of 4.35/cell .Is there a way to do this

Helicopters are a mass of rotating metal fatigue surrounding an oil leak !

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09-26-2015 12:33 AM  3 years agoPost 19
hemp

rrApprentice

Portland, OR - US

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I bought a Icharger 406 duo a while back . I just got some new HV Hyperion packs and would like to fully charge them to there max voltage of 4.35/cell .Is there a way to do this
Sure can. It's in the manual:
http://leomotion.com/download/Ladeg...arger406DUO.pdf

LiPo/LiIo/LiFe Battery Charge Setup (pg 16)
Select Program→Charge to enter Charge setup interface.

Chg Cell Volt: 3.85V/Cell-4.35V/Cell;


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09-26-2015 12:56 AM  3 years agoPost 20
Charlie R

rrApprentice

Lafayette Ca

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Thank you !

Helicopters are a mass of rotating metal fatigue surrounding an oil leak !

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