Silent-AV8R

A friend of mine has started bringing in a relatively new line of Lipos. He was at the AMA show and has mostly been doing smaller packs. Three of us in District 7 have gotten a set of 5S 25C 4400 mAh packs. The attached photo shows that mine weigh 1,045 grams with APP connectors installed. For comparison, my 5S SkyLipo 4400s weigh 1,141 grams with connectors. Going to fly them in a while, and I'm sure that steve Hannah and Jarvis Johnson (both have sets as well) will provide feedback. Expected price is around $90 to $95 per pack. Feedback from other users have been very positive, but those are on the 65C cells they also import. So the 25C pattern type cells are brand new.

Here's their website: http://www.DinogyLipos.com

underdw

My Feedback: (2)

Any plans for 5000mah or 5400mah packs?

Silent-AV8R

I think he is testing the market right now. But I think he will at least do some 5S 5,000 mAh packs. They have larger capacity in the 65C line.

rgreen24

My Feedback: (6)

Let us know how your testing goes

Silent-AV8R

Just finished first post flying charge. 2,675 mAh replaced (61% of capacity) 21 milliohm total pack IR (4.2 milliohms per cell average). 44 minutes for 100% recharge at 1C. Going to fly them again later today.

First flight barely got the packs above ambient (72 degrees) yesterday, no heat felt during charge. Power felt more stable over that flight as well with very good power left at the end (Abbra with Plettenberg Advance - OS 100-amp ESC) of one pass through the Advanced sequence and about 1 minute of fooling around plus landing.

So far so good.

shannah

My Feedback: (5)

I got my packs and assembled them (here's the website: http://www.dinogylipos.com/). Here are some comparisons with the SkyLipo 4400 40c and 20c packs as well as with the Zippy "compact" 5000 25c.

The Dinogy packs weighed 1040g out of the box. Fully assembled with velcro on the bottom and 5.5mm bullet connectors = 1065g

SkyLipo 4400 40c = 1135g
SkyLipo 4400 20c= 1145g
Zippy "compact" 5000 25c= 1205g


The IR seems to be in the 4milliohm range per cell during my first charge, which is what I saw on the Zippy "compact" cells when I first charged them. The SkyLipo's tend to come in around 1.5-2 when they are new. But, the Dinogy is a different chemistry. They are labeled as a Nano Tech Battery, so they are probably using some different materials vs the SkyLipo.

Here are some comparitive pics, for what it's worth

Silent-AV8R

Just completed my second charge on these packs. 63% (2,760 mAh) used for one pass of the Advanced sequence and about 1.5 minutes of trying to do actual recognizable figures. 1C recharge, IR at charge termination was 15 milliohms on both packs. So about 3 milliohms per cell. I'm liking them so far.

Good consistent power from start to finish, lighter weight, so now the question is how long they will last. But so far I'm happy.

BTW - I am at 1,055 with APP & velcro.

MarkF

Thanks for the reports guys. Some of the top pilots over in Europe are haveing great success with these packs. They switched from Thunderpower to the Dinogy's and reported back they like these packs better. My prices on most of my packs are 35 to 40% lower than TP and I do give a 6 month warranty. I am a new company and specialize mostly in 65c rated packs and believe I have the best packs in the industry. I also can make custom packs up like if you want 10 cell sticks or bricks and packs paralleled up for more mah.

I see some of you guys want to see some 5000s. What is the most weight you would except if I had some made up. I will try and see if they can make some and still be under 600 gr. but wanted to know if they were a little over would you still buy them.

Thanks for looking at my site ( still a work in progress ) and I do apreciate all feed back from you guys.

Mark

Jason Arnold

Hi Mark,

Great to see another LiPo option in the market for F3A.

Personally, I wouldn't use packs much over 600 grams for a 5S. I'm currently using TP 5000 25C and F3A Unlimited 4900 packs which are sub 585 grams per 5S pack. The F3A Unlimited packs have 10AWG discharge leads which is way more than we need and just adds weight. 12AWG is all we need and is what TP have on the 5000 25C packs.

Guys running the contra drive systems are starting to use the Compact 5800 packs down under. This gives them a little more headroom but at the cost of extra weight.

Generally speaking, weight is king in F3A. We want more for less... :-)

Cheers,
Jason.

woodie

Mark, hope all goes well with your new business, from a consumers viewpoint, competition is 'good'.

One thing to keep in mind with F3A/pattern type aircraft, we are not after blazing performance for a short period of time. Rather, what we need is steady performance lasting long enough to complete a pattern sequence. The higher C rated packs may offer great high amp draw performance for short periods of time but we typically seldom use full throttle during flights, but rather try to maintain a constant (less than full speed) speed through out the flight.

Personally, the 25-35C packs are more than adequate for my needs, the 40C and up packs are rather 'touchy' on throttle and harder to maintain steady speeds, and the available power thru the flight changes pretty rapidly. Additionally, the higher the C rating for a given capacity, the heavier the pack, the heavier gauge the wires needed to handle higher amps, etc.

Woodie

underdw

My Feedback: (2)

Mark, +1 to the other's comments. In addition to competition, I think the F3A battery choices suffer from intermittent availability.

For my situation, I've got little weight headroom, so I'm looking for packs 600gms or under. Also need the 5000mah to make it through the long FAI and Master's sequences without excessively draining the packs.
I often practice with heavier, cheaper, and higher capacity packs, hence my interest in 5400mah packs.

Looking forward to seeing what you can come up with for us.

Dan

shannah

My Feedback: (5)

Hi Mark,

Great to meet you at the field today. I liked the 4500 25C packs. Smooth power delivery, no drop off through the flight. The light weight is a real plus.

I just finished charging them and I noted that they were just over 37.5v as I put them on charge. I put in 3350mah. That was after a P13 flight that was in the wind and pretty big and fast. That's the outer range of what I normally fly but pretty good for the footprint and speed I flew them at (I wouldn't have been surprised to be over 3600). My SkyLipo 4400 20C's (3.5months old) were about 36.8v and I put in 3870 for the same footprint and speed.

As for the 5000mah argument, I personally don't see the need for them in most cases but they are good for FAI F13 and unknown type sequences. Masters and FAI P13 typically don't need that capacity. I fly 4400's in both F and P. I have a set of 5000's for the big fast wind conditions. So, they aren't absolutely required .. but, hey, if you can get them in at around 600g then they will be popular.

MarkF

Thanks for the comments guys. I am an rc racer for 20 years myself so I do understand very well what your saying. I will work on gettin some 5000s made up but that will take a little time. The testing has gone very well so far and I am going to have some more packs made. It's Chinese new year right now till mid Feb. so it wont be untill the end of the month or so. I will let you guys know here in this thread first when they arrive. The price will be $90.00 for a 5s 4400 pack. Thanks again for your interest.

Mark

Silent-AV8R

Good seeing you today as well Mark. I really liked the F5B plane!! As I told you, I'm down for some more of the 4,400 packs. 3 flights on the set I have now and I am really liking the consistency in power delivery from start to finish. After flying the Advanced sequence once and making a couple of play passes I pulled vertical and flew 1,000 straight up. I have the low voltage alarm set to 34 volts on my radio. My Skylipos will trip that on the last figure (45 up line-1/2 roll - push 135 degrees to level). The Dinogy packs did not make a peep on that 1,000 foot upline (confirmed using on board telemetry) and when I landed they were reading 37.2 volts at shutdown.

I'll be charging them in the morning, it will be interesting to see what they take back.

pvogel

I don't see the 25C batteries on the DinogyLipos.com site, how does one order these?

For what it's worth, I'd prefer to get 10S bricks as a unit rather than join two 5S packs in series. My 10S Zippy Compact 5000s range in weight from 1116 to 1160g.

Peter+

Silent-AV8R

Right now all that he has are the 65C packs. Mark mentioned today that he plans to order some more of the 4400 packs and to work with the manufacturer to get some 5,000 5S 25C packs as well. If you are interested I'd contact Mark directly at the email on the website.

Also keep in mind that there is more to this than just weight. Weight is easy to determine, as is cost. But the real value shows up in performance and longevity. The 65C packs seem to provide both and there is no reason not to assume that the 25C packs will as well.

MarkF

Thanks again guys for the interest and thank you to Bill and Steve for trying them out and reporting on them here. I will get them up on the sight when I have them in stock. I just placed my order and when they give me an eta I will let everyone know here.

Mark

MarkF

Ok it's Chinese New Year right now untill the 18th of Feb. They say I will get my order in the early part of March. Thanks to those of you who have giving me a heads up on your orders.

Mark

MarkF

I wanted to give you guys waiting for these packs a heads up on when they will be in stock. My order will be ready to ship on the 8th so I should have them in my hands by the 15th. I will post when I actually have them in hand.

Mark

Silent-AV8R

Cool. My tired old SkyLipos are about ready to go out to pasture!!

MarkF

Hey I wanted to let everyone know my packs came in. The 5s 4400 weigh in at 525g and will sell for $90. Each and the 5s 5000s weigh in at 585g and sell for a $100. Each. I only have a few of the 5s 5000 packs because I wanted to see what the weight was going to be before ordering a bunch of them. There not on my site yet so you can email or pm me direct for your orders.

Mark

Jetdesign

My Feedback: (8)

Does anyone know who is designing these, or where they are made? Who is supporting any issues?

elan120

My Feedback: (1)

Mark,

Can you confirm the weight of 5S 4400 packs? I assume that was a typo and the actual weight is 552g instead.

In the meantime, can you advise what C rating charging can these packs take? I am hoping they can take more than 3C charging.

Kevin

Silent-AV8R

I'll let Mark speak to the manufacturing questions. But Mark, who lives in southern California, is selling and supporting them in the US. I've known Mark for several years and he is a straight shooter and is very well known in the RC boating world where he holds several National speed records for fast electric boats (like over 100 mph).

I've got about 15 cycles on my first set of the 4,400 packs. SO far they are out performing my Sky Lipos, even when those were new. I can fly the Advanced sequence once and then play around for another couple of minutes before landing and still be at 35% to 40% capacity remaining. This is on an Abbra with a Plettenberg 30-10 Advance, OS 100-amp ESC, and an APC 21x13.5 prop.

They cost a bit more than Sky Lipos and a lot less than the comparable TP (G8 ProLite 4,400 @~ $154). I'm sold on them and will be using them as my primary packs for the 2013 season.

Silent-AV8R

My 4,400 packs taped together with strapping tape, a balsa piece to separate them for airflow, and with velcro and Anderson Power Pole connectors (1 on each pack) weighs 1,052 grams. For comparison, my SkyLipo 4,400 in the same configuration weigh 1,136 grams. Both weights are fully charged and jammed-packed with fresh electrons [&:]


The pack labels says they are rated for 5C charge rate (22 amps). I charge mine at 1C as a general rule. I use a Hyperion EOS0615DUO charger and with a 12V power supply I am limited to about 140 watts per side. Charging at 1C usually takes right around 45 minutes to recharge from 35% remaining capacity. That includes time for balancing.