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

[Drax21]

I didn't get to run the boat as it has rained all week here in the UK so the batts are at storage value again.....

I really want to run both the batteries on the same day, on some flat water, so I can then see which gives the greater power and thus the best speed. I'm confident it will be close!
I will post the results here when I have got the runs in.

[Drax21]

Winmax Batteries Test 2 HIGH AMP

So I upped the prop to an M645. I had good speeds and low heat on the M445 so I went up 2 pitches. The amps went through the roof but proved a good test for the Winmax batteries.

WINMAX V2.jpg

The amps were so high that it melted the solder on my eagle tree system on both Negative wires and partly on one esc wire... then the boat cut out in the middle of the lake.
For me the batteries did not respond too well to the battering. Eagle tree measured 183 amps at it's highest but since it measures top of the graph the spikes could have been much higher. The system is rated at 150amps. The batteries were warm to the touch when I finally retrieved the boat 20 mins later. At 27 degrees so I estimate was nearer 34 degrees when the boat cut out. They also looked slightly puffed at first but are fine now upon cooling down.

The run was about 2:30 long and they came back in with measuring 15.43 Volts in each.

I won't be using this prop with this set-up again but at least it gave me a bit more info to share.

I will upload a vid of the run shortly. You will notice the water was like glass today so I was a bit annoyed when the fun was over only 2:30 in. Temperature outside was 25C .I had also charged up the Hyperions to run after but ended up taking them home to discharge on the I-charger. Stinger angle could of done with being adjusted to suit the water.

Let me know what you think.

[Drax21]

Here's the vid

[detox]

Lots of on and off hard throttle is very hard on any esc/battery/connector combo. Also running the lipos past their 70 percent capacity will make the best lipos swell. I have some swollen 3s 4200mah hyperion packs that I run in my Emaxx, but they still work fine. Test by trying to simulate a real heat race (1 or 2 mill laps followed by 5 EASY on the throttle fast continuous race laps)

[Drax21]

Lots of on and off hard throttle is very hard on any esc/battery/connector combo. Also running the lipos past their 70 percent capacity will make the best lipos swell. I have some swollen 3s 4200mah hyperion packs that I run in my Emaxx, but they still work fine. Test by trying to simulate a real heat race (1 or 2 mill laps followed by 5 EASY on the throttle fast continuous race laps)

Yeah I never run the lipos past 70% but I am guilty of the hard throttle. The extra connection of the eagle tree was the main problem. I reckon the connections would have been fine otherwise.

[ozzie-crawl]

I will have to ask a mate how he gets his eagle tree display up.
This was a screen shot taken a few years back of a 32" apparition cat.

[Drax21]

I will have to ask a mate how he gets his eagle tree display up.
This was a screen shot taken a few years back of a 32" apparition cat.

It looks like he had bought a few add on although I should be able to show most of that data. I will try later.

[Chrisg81983]

Tim I noticed when using the eagle tree especially when pushing it to it's limits I only run for a minuet or two max. Just to get some data This works fine for me I ran into the same problems that you just had when trying to run longer but now that I run in the 90 second range I recorded data well above it's specifications many times and never have any problems

[Drax21]

Tim I noticed when using the eagle tree especially when pushing it to it's limits I only run for a minuet or two max. Just to get some data This works fine for me I ran into the same problems that you just had when trying to run longer but now that I run in the 90 second range I recorded data well above it's specifications many times and never have any problems

Cool, thanks for the info Chris. I just soldered the wires back on the system so will just run it shortly next time. The motor and esc were about 27c when the boat finally floated back in so was probably about 37c when the run ended. Not sure if the prop was too much? The Winmax batts were definitely kicking out the power again.

[jcald2000]

This easy fix will solve that problem.

http://forums.offshoreelectrics.com/...-in-15-minutes

[Drax21]

This easy fix will solve that problem.

http://forums.offshoreelectrics.com/...-in-15-minutes

Yeah I saw that. It's a great idea. I think I commented on the thread Haven't done mine yet but will definitely be happening before I use it again.




I hope to be off to the lake shortly with both sets of batts again

[Krusher]

-Moved from the older thread to this one-

I found this thread by searching on Yahoo! for WinMax Lipo batteries and thought I'd add some FYI. I ordered my 3S packs on Wednesday and they arrived here today (Friday) from Leadershobby. They are 4200mAh, 50C batteries on sale from the Miami warehouse; China would have been much longer of course. Here's the voltages I have on the 4 packs. Meter=Amprobe AM-140-A. (It's a decent, accurate portable meter if you don't have lots of $ to spend on a Fluke).

1=3.8956, 3.9156, 3.9144
2=3.8964, 3.8846, 3.9043
3=3.9134, 3.9166, 3.9144
4=3.9038, 3.9137, 3.9054
Weight (avg)=357g

Since I use 6S total, I'll be pairing up 1+2 and 3+4 most likely.

I'll post a follow-up message in the future once I get connectors on them and a few runs in late next week. I'm going from old 30C 4000's to new 50C 4200's so it should work out well (I hope).

[Krusher]

One more thing.

To those who are using these batteries, where do you have your cutoff voltage set to? My ESC by default is 3.2V/cell, but I can go higher (and lower). There doesn't seem to be any information in the box or on the battery regarding that.

Thanks!

[Drax21]

So I ran both sets of batteries today but something went wrong. Run times were very short and I am unsure of the reason. The voltage dropped so fast in both sets of batteries that before my beeper could go off at 3.40 the cells hit 3.00. All of them! I will put up more detail shortly and some vids. Any ideas as to what the problem is? I was running the packs in parallel for about 8mins before ending on 3.4 V but now I am only getting about 4mins. I'm thinking Esc???

[Drax21]

Hyperion

They ran great as usual but run time was less. Around 6 mins total.
Top speed was 45.3MPH

The voltage dropped so fast that it was at 3.76 then 20 secs (actual time) of running later it was 2.97 per cell. My lipo protector is set at 3.4V, it went crazy beeping all of a sudden. The cells did not even puff/swell and they have gone back up to storage values no problem. Will have to sort out this voltage drop problem though.

Sorry for the short vid. I had another better one but deleted it by accident. I was meant to delete this one