Graphene lipo review

[mappo]

https://youtu.be/wSPaOd2Nc8E

Review on a turnigy ultimate vs Graphene lipo.

[T.S.Davis]

Sure sounds like they're the same doesn't it?

[dethow]

Sure sounds like they're the same doesn't it?

Yes it does, but those that have run these in boats at higher amp pulls are observing much lower temps in the graphenes. I'd also wonder if the voltage drops are less at higher amp draws. And time will tell if the life of these graphenes makes them worth the extra money. Along with less risk of fire in your expensive boat.

But yes, if you're only pulling 30 amps... doesn't look like you should waste your money on graphene.

[GatorBait]

The battery data issues draw me to ask a semi-relevant question. At the risk of speaking out of place as I transition to FE boats from a decade of RC planes, EDF jets and most recently cutting edge FPV quad/wing racing....

Has anybody adapted real-time OSD (on screen display) FPV telemetry to the FE boat world to get accurate run-time telemetry data? It's become pretty easy and inexpensive compared to the avg boat value.

Even if you weren't up to the full up FPV on-board experience with headset or screen, it's easy and relatively inexpensive to record the whole run/flight OSD in real-time and later review rpm/voltage/amperage/temps/mah used/speed etc to perfect a setup. ..... It would seem far more accurate than trial and error or bench data. Not to mention easy to program instant audible telemetry warnings if mtr/batt/esc temps or mah levels spike/fall to unacceptable levels where a shutdown prevents eqt loss.

For this topic, battery temps/voltage/amps/rpm/speed would be very telling. Especially with a quick battery swap comparison in the same conditions.

It's not wildly revolutionary in the world of RC flight any longer, especially for those who are pushing the envelope and don't like collecting their eqt in a trash bag after a failure...... been there.

Just a thought. Good luck on the latest battery quest and rest assured that this isn't the only RC genre' seeking that next battery epiphany.

[RaceMechaniX]

Welcome Gatorbait,

There are people logging data in boats which is quite common. The Castle, MGM, Swordfish and other controllers all have this built in.
Some have been experimenting with telemetry radios like those offered from Futaba and Spektrum where you can see voltage, temp, RPM, etc.
Others are using independent systems like Eagle Tree and Unilog.

I don't believe anyone is using FPV for boats. A HUD's would be nice for some applications, but most of us test and race under consistent conditions. So we develop known set-ups to avoid failures.

Those of us running at the extreme's test, test and test to find the limits whether in the boat or on a workbench. I would argue electric boats are the highest load application out of any hobby field.

TG

[GatorBait]

Thanks, After you mentioned it I recalled being told about data logging stored in the ESCs for post run review. I'll be watching to see how/if real-time data telemetry breakthroughs might be useful as the tech blends in from other genre's. The real-time audible telemetry warnings from my TX will be missed in boating.

If it's any help, we've been finding better results with batteries sold as Graphene tech in hi-perf racing quads and EDF jets as batteries consistently shrink and still tolerate more abuse. Graphene or not, the latest chemistry is holding up to load stress somewhat better than last years magic formula so maybe there's something to it.

I'm back to the sidelines waiting for the final word on the next boat battery investment. Thanks to those who generously post their findings. It's an enormously encouraging resource to guide those coming in before expensive mistakes are made.
Thanks, Mike

[T.S.Davis]

I will say this. I've raced three different brands of graphene cells in my boats now. They've all performed pretty well thus far. The Giantpower I couldn't even get warm. The Turnigy I over discharged and they don't seem any worse for the wear to me. The Revos ran well for one heat. The boat wouldn't cooperate after that. Never figured out what the deal was.

Dave is likely right. At 30 amps no difference. At 150+ amps, who knows for sure.

I don't know if everyone is going to that layer of G10 on the surface but I really like that. Less prone to getting banged up just riding to the pond in a box.

That reminds me. Has anyone ever had a pack where one of the cells voltage is much higher than the others? I have a Turnigy 3.0 graphene where one cell jumps to 4.265 during the charge. It's sudden too. The iCharger shuts it down as soon as it detects the spike. Not sure what to make of it. Maybe my iCharger is losing it's mind.

[ray schrauwen]

More likely the battery than the charger.

[ray schrauwen]

Maybe the same however those packs have 2p inside. I don't trust running high amp setups with packs saying 2p but, like said, 30 amps is no problem.

[Fluid]

i had a new 6S pack which had one high voltage cell, at first by 0.6 volts above average. Even two different balance chargers would not fix it, so I kept cycling the packs (keeping the high cell below 4.2 volts) once a day for two weeks! Eventually the pack balanced okay, but the high cell is balanced perfectly at full charge, off by 0.1 volt discharged. Other packs from the same source balance out at 0.003 volts. Go figure.


.

[tlandauer]

I normally maintain all my packs at storage charge, however as I got into flying I have not been boating for more than a year. I used to run Dinogy packs when Mark was in Orange County and i will pick up a few on my way down to the symphony.
I realize lipo battery is a fast changing arena and am looking at similar packs in terms of price, performance... Specifically I am looking to replace my 4s/5000 mAh packs ( for parallel setup) and 2s/5000mAh packs ( for series setup) .
I went to the Revo site and even they have changed their product in a mere year, this is really a " if you snooze , you lose" field...
Any input or suggestion is much appreciated.
Cheers!
Tim

[mappo]

http://www.propwashed.com/graphene-lipo-battery-performance-tests/

[tlandauer]

Thanks for the link.
I have to apologize that I have asked my questions in the wrong thread. I am not asking particularly about these graphine packs. My question was a general one for all around good lipo.
I don't race but do want good quality packs.

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[MarkF]

Tim

I think you will find the Dinogy Graphene a great all around pack. One thing I don't see from these reviewers is cycle test. It's become common knowledge the HV packs have very short cycle life. A lot of the quad racers are claiming 30 to 40 cycles from HK and Revo HV packs. I would also like to point out Dinogy did very well at the namba nats with several fast times being broken and many first place wins.

Mark

[JimClark]

Mark is there an actual chemical difference in the Graphene cells or is it more marketing mumbo jumbo?

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