Winmax 50-100c Lipos vs Hyperion 45-90c . Battery testing Review.

[Drax21]

I'll agree with you on that; I'm not saying every application is the same and we should try different things to see what happens. I couldn't tell any difference in speed or temp on my 1415 from 15 to 7.5, but all I had was my GPS and a non-calibrated finger lol. I do like the Castle comment from the president however. It just basically says to take it easy and that more is not better unless you have a reason for it.

So FWIW, backing off the timing on Drax's setup will likely only make a significant difference if he is already over 15 degrees. Once I get my charger back I can do some experimentation myself (on top speed anyway).

Yeah I'm at the standard on the SK180 which is 15 degrees. On another point..... I was looking at the Turnigys I bought for my latest DF41 build. I have used Turnigy in the past but I went away from them because of higher resistance and quality issues. Since then they have said that they have made a new formula for all of there batteries and it looks like it has been pretty effective. The resistance is very low. Will get some data up later of the readings.

[martin]

My next set of batteries are going to be Gens Ace, their are more & more starting to use these with very good results for a mid price lipo. Ive also seen a number of test done with diff make lipos inc Gens Ace & the ir was very low on the Gens compared with Turnigy inc their Nanos.

[Krusher]

It seems like more LiPo batteries are suddenly becoming "Nano" batteries. Makes you wonder what these manufacturers are defining as a Nano particle and whether they all hold the same standard. Probably not.

Either way, let us know Drax and martin how they work out for you. It would be nice to find something closer to the Maxamps batteries at a little less cost anyway. i.e. these 50C Winmax batteries look decent, but they aren't much heavier than my old 30C batteries (although they're a bit longer). It must be that new Nano technology. Yeah, that's it.

[Drax21]

Turnigy Battery Resistance

Measuring 4x 4s 5000mah 40-50c Turnigy Standard batteries.

Battery no1 - 2 1 5 4 = 12
Battery no2 - 4 2 6 5 = 17
Battery no3 - 2 1 5 5 = 13
Battery no4- 1 1 5 4 = 11

These are used batteries which I bought off a member on here. The Resistance is lower than that of Hyperion and lower than the previous Turnigys I had a couple of year ago (They all measured in the 20s total resistance). Some of the cells are even showing a 1 which is extremely low resistance.

I have to wonder though. Is more resistance actually better for your battery? Like with the Hyperions and Winmax. The Hyperions with higher resistance held up better under extremely high draw not even puffing. The Winmax gave out a little.

[Krusher]

I have to wonder though. Is more resistance actually better for your battery? Like with the Hyperions and Winmax. The Hyperions with higher resistance held up better under extremely high draw not even puffing. The Winmax gave out a little.

Well, internal resistance is like little resistors connecting your cells together right? So you'd want the smallest ones possible to generate the least amount of heat. But maybe there's something else involved in the cell construction that makes one less likely to puff than the other...like stronger plastic maybe :)

[Chrisg81983]

What do you mean by stronger plastic I think you might mean heat shrink well if so I mean this in a very nice way but I think that is way off I had cells that when puffed they split the hard case this is not there to keep from puffing it tis there to protect the pack puffing comes from stressing the pack past it's limits some packs have a better, stronger , more advanced chemistry to them this is why you pay double for hyperion there are some cheaper packs that may seem like they compare to them performance wise but in overall they don't this is why his hyperions did not show as much damage as the other cells so heat shrink even if doubled or tripled up is not intended to prevent swelling of packs. This is the simplest answer without going into great detail and filling up a whole page of info you can't only go off internal resistance

[Krusher]

Wow that's a long sentence lol.

I think at this point we're just making some guesses. If you made the Lithium plates a little thinner and the plastic a little thicker, you'd have higher internal resistance and they'd puff less. So that's my vote.

EDIT: It could also be that Hyperion used smaller/longer wires on their balancing plugs so the resistance reads higher. When in fact it could be lower from cell-to-cell.

[Drax21]

Wow that's a long sentence lol.

I think at this point we're just making some guesses. If you made the Lithium plates a little thinner and the plastic a little thicker, you'd have higher internal resistance and they'd puff less. So that's my vote.

EDIT: It could also be that Hyperion used smaller/longer wires on their balancing plugs so the resistance reads higher. When in fact it could be lower from cell-to-cell.

Hyperion uses different wire to any other battery I have. Not as bendy and IMO harder to solder. It springs out when you cut the silicon away.


Forgot to say.... I charged my batts up last night and all cells went back up to 4.20. The wandering cell problem I had on one of the Winmax batteries is now gone

[Drax21]

Winmax and Hyperion run 6

Ran the batteries yesterday. The run times are still shorter than they use to be and my top speed has gone down so I would say the motor is now only 80% efficient instead of the original 90%. Using this to work out the speeds I should be getting- http://www.offshoreelectrics.com/conversion.htm

Ran the Winmax batteries first.

Run time 5.30 mins
Top Speed 44.3MPH
Temp at the end of run 47c



Then the Hyperions

Run time 6 mins
Top Speed 42.3MPH
Temp at the end of run 47c



I timed these runs and brought the boat in 3 mins in between the runs on both sets. The voltage drop is pretty astounding although did not drop as fast as last time. The motor appears to be drawing a lot more amps than it was previously. I'm going to replace it at some point.

[Drax21]

Video added

[Drax21]

Just had a check on Leaderhobby's website and the price of WinMax 4s 50-100c 5200mah LiPos has risen from $52 to $62 each. They must be selling a fair few. I can understand why with the results I have had. Last time I spoke to a Leaderhobby representative, she said that $52 for the above mentioned battery was a wholesale price. Interesting eh?

[Krusher]

I have my Cellpro 10S back finally and had a chance to run my 3S, 4200mAh batteries twice.

Right after the cell resistance [mohm] popped up on my first charge, I had...
1=2.1, 2.1, 2.1, 3629 mAh
2=2.1, 2.2, 2.0, 3589 mAh
3=2.2, 2.3, 2.1, 3613 mAh
4=2.0, 2.1, 1.9, 3607 mAh

I used packs 1+2 paired with 3+4 paired.

Cell voltages after sitting overnight are:

1=4.19230, 4.19008, 4.19565 = 12.5778 at high current terminals
2=4.18589, 4.18554, 4.19069 = 12.5620 at high current terminals
3=4.17346, 4.18354, 4.19434 = 12.5512 at high current terminals
4=4.19025, 4.18565, 4.18948 = 12.5652 at high current terminals

I finally decided to get a nice bench meter so I'm not making those extra digits up. :)

Overall, the batteries seem like a good deal so far. My old batteries used to be the hottest running part of my setup; these batteries run warmer than my ESC but cooler than the motor.

I'm going to be away from my PC for a week; so if someone has a comment after tonight (Friday) I will get back to you later.

[Krusher]

Everything has been working good and I have a chance to comment on some longer-term testing.

Overall, I seem to be averaging around 3.9 miles per set of batteries on my boat with a small (S215) prop. That's a mile less than when the batteries were brand new, but I believe that is due to me running the boat harder and not any loss in capacity. The batteries charge up to roughly the same capacity and always report 2.0 mohm internal resistance or less per cell after charging finishes. No cell puffing like I had earlier with my 30C's. I may get the same batteries again after a few seasons or something else on sale in the future. It would be fun to get a set of MaxAmps LiPo's for comparison purposes to these, but there are so many other goodies out there to spend $ on. These "C" ratings on batteries are misleading anway, i.e. my 4200 50C batteries can do 210A? Ya sure they can...have the fire extinguisher ready.

most Y winds do like the 15*

I also played with the timing a bit, going back and forth between 15 and 7.5 degrees of timing advance. Overall, I do get 1 MPH more on average with the 15 degree advance according to the GPS. I don't have a thermometer that I can put on the motor, but left it at 7.5 degrees since I'm not racing. With the bigger S225 prop, I'm consistently getting 41 MPH anyway. So, I just change props when I want more speed. But for everyone else, it pays to experiment.

[Drax21]

Everything has been working good and I have a chance to comment on some longer-term testing.

Overall, I seem to be averaging around 3.9 miles per set of batteries on my boat with a small (S215) prop. That's a mile less than when the batteries were brand new, but I believe that is due to me running the boat harder and not any loss in capacity. The batteries charge up to roughly the same capacity and always report 2.0 mohm internal resistance or less per cell after charging finishes. No cell puffing like I had earlier with my 30C's. I may get the same batteries again after a few seasons or something else on sale in the future. It would be fun to get a set of MaxAmps LiPo's for comparison purposes to these, but there are so many other goodies out there to spend $ on. These "C" ratings on batteries are misleading anway, i.e. my 4200 50C batteries can do 210A? Ya sure they can...have the fire extinguisher ready.



I also played with the timing a bit, going back and forth between 15 and 7.5 degrees of timing advance. Overall, I do get 1 MPH more on average with the 15 degree advance according to the GPS. I don't have a thermometer that I can put on the motor, but left it at 7.5 degrees since I'm not racing. With the bigger S225 prop, I'm consistently getting 41 MPH anyway. So, I just change props when I want more speed. But for everyone else, it pays to experiment.

That's some good info Krusher, as a heads up don't bother with the Maxamps at all. There are numerous threads about the overpricing and bad quality. You get about 1 good run out of them. A good comparison would be against Gens Ace.

[Krusher]

That's a surprise and also valuable info. I will make a note of Gens Ace for the future.