Originally Posted by WimH

Because several independent testers found the 25C batteries to be better than the 40C ones from the same manufacturer during the same test. The 25C seemed way underrated, the 40C well overrated. ...

Originally Posted by everydayflyer

Some of us have been testing and using batteries for many years even long before LiPolys came along and we are not easily fooled (hood winked) by slippery folks in marketing .Charles

If anything possibly more marketing savvy than “slippery” marketing. Wouldn’t exactly call it being "hood winked" when you’re getting a “way underrated” LiPoly than that indicated on the label. Neither could you really accuse GensAce of being “slippery” if the next GensAce 25C batch runs coming down the pipeline were closer to 20-25C instead of being “way underrated” (closer to 40C than 25C).

Would GensAce be so savvy as to do a massive hugemongous run of those underrated GensAce 25C, then label them 35C and sell them for an even sweeter price than their competitors overrated 40Cs.

Originally Posted by nippaero

Any more updates after flying these batteries? I need to get some more 6S 5000's and am curious how the performance is holding up.

Have about 6-8 fligths on the two 6S 3000mah 40C batteries that I got. They have really good power, I can audibly tell I am getting a higher headspeed than the 25C batteries I have. The performance is great and the batteries come down just a tiny bit warm to the touch...warm, less than 100F I would think..

When charging they take a bit of time after the charge to balance completely to
.005< Resistance is a bit high at 12-15 ohm. (Some batteries I have are in the 6-8 range.

Flying in a Trex 500esp 6 minute sport flying with some flips and rolls thrown in.

Real test will be using both in the 600e Pro that I am building.

SO far so good!

Originally Posted by microwave

If anything possibly more marketing savvy than “slippery” marketing. Wouldn’t exactly call it being "hood winked" when you’re getting a “way underrated” LiPoly than that indicated on the label. Neither could you really accuse GensAce of being “slippery” if the next GensAce 25C batch runs coming down the pipeline were closer to 20-25C instead of being “way underrated” (closer to 40C than 25C).

Would GensAce be so savvy as to do a massive hugemongous run of those underrated GensAce 25C, then label them 35C and sell them for an even sweeter price than their competitors overrated 40Cs.

ya and there were 2 men on the grassy noll and elvis still lives in TX. Come on. This is all a little out there. Not to mention a little inappropriate to be bringing up a switch-a-roo theory in a Haiyin official product launch thread. Weird.

Originally Posted by TossinHoss

Have about 6-8 fligths on the two 6S 3000mah 40C batteries that I got. They have really good power, I can audibly tell I am getting a higher headspeed than the 25C batteries I have. The performance is great and the batteries come down just a tiny bit warm to the touch...warm, less than 100F I would think..

When charging they take a bit of time after the charge to balance completely to
.005< Resistance is a bit high at 12-15 ohm. (Some batteries I have are in the 6-8 range.
...

Is that IR per cell or whole lipo?

Originally Posted by microwave

...their competitors overrated 40Cs.

Please read properly, the 40C were ALSO Gen's Ace, so your comment is a bit out of place....

Originally Posted by WimH

Please read properly, the 40C were ALSO Gen's Ace, so your comment is a bit out of place....

One reason Charles may have first mentioned GensAce and Thunder Power Pro Power is that they may be a suitable brand to compare/bench test against HAIYIN. Some less expensive bargain brands tend to inflate their packs discharge rate (40-50C). HAIYIN manufacturers a few 3S packs rated at 40C that hopefully are truly rated or at least much closer to 40C, than some of the other competitively priced brands that are significantly overrated … Congratulations and HATS OFF TO HAIYIN, if they have been paying heed to Charles and other members who are discussed with the slippery slope of some LiPoly manufacturers.

Would like to share part of email received that is timely to this post … At Haiyin, we want to be known as "the honest made in China quality lipo manufacturer guys". There will be no mislabeling of our packs/specs ... Eric F

Some less expensive competitively priced 3S LiPoly packs that are rated at 40C and 50C are suspected by some of being overrated. Of HAIYINs fifteen different mAh size 3S packs (from 500mAh to 5000mAh) only a few have a discharge rating of 40C … being the 2650mAh, 3000mAh and 4000mAh. Most of their 3S packs are in the 20-30C range. I give HAIYIN credit for apparently not overrating their packs, but rather using specs that are hopefully a truer discharge rating, rather than succumbing to the game playing of overrating their packs in hopes of increasing their market share and sales.

Originally Posted by everydayflyer

... TPPP45 3S 2250 was charged at 11A (4.88C) and discharged at 40A (17.77C) that is a 3 min. discharge equal such as in an extremely hard 3D flight..

The first 40A discharge was used as a base point and during the life cycle testing the capacity delivered was compared to this fourth cycles test.

After 300 cycles the 3S Thunder Power Pro Power 45 still delivered 91.8% of the capacity obtained first time 40A (17.77c) discharge was completed.

Now some will be fast to point out that since the PP45 was rated for 45C I was only discharging it at just 39% of it Cont. Dsc. rating but the subject which seems to be in question here is charge rates effecting life not discharge rates .
Charles

Perhaps, we need to cut even the best manufacturers some slack when they rate their LiPolys at 40C or even 45C. Realistically, is it even practical or possible to get 100 performance cycles from even a TPPP 45C that is continuously discharged at 45C or 40C or even 35C over and over and over again. Perhaps, we need to accept the reality that even the top-of-the-line LiPoly brands rated at 40C or 45C are not truly intended to be continually punished at that high of a continuous discharge rate over and over and over again.

In practice don't we buy them (40C-45C) so we can have longer bursts than 5-10 seconds for pylon racing, "extremely hard 3D flight" or heli at full throttle at a discharge rate possibly approximating 40-45C. So before some of you start testing HAIYINs 3S 2650mAh, 3000mAh and 4000mAh 40C packs for what you may determine deserves a more conservative cont. dsc. rating ... we may first want to redefine/reevaluate what a 40-45C pack should be able to deliver in longer bursts in relation to say a 20C pack. Is the current state of LiPoly technology even capable of manufacturing a 3S pack capable of 100 cycles at 45C, and if so would we want to pay the price for a TRUE 45C if most of us are discharging it closer to 40-50% of its cont. dsc. rating?

However, once again there are possibly too many opinion/variables to get any kind of meaningful consensus.

Originally Posted by alexf1852

Is that IR per cell or whole lipo?

Not sure if its measuring it from the balance connector or the main lead. I would think it would be from the main lead.....

Xxx

Post a picture of it attached to the meter you are using to measure it, showing the "pretty bad" out of balance condition.

That's awesome. There sure is a lot of mud-slinging completely without substantiation, isn't there ? It get's to be such a bore.
I've been using ThunderPower packs for years. They have been very,very good to me. Funny how that's the brand the misers like to bad-mouth but it's the brand that sells pretty darn fast for used packs .
However, I bought two 40c Haiyin 5000mah 6s a couple weeks ago for a high stress 12s set-up. I have wrung them out silly for 36 cycles now without a hint of puffing, I am flat impressed. They don't seem to run as strong as my TP 65's as well they shouldn't , but they're VERY good, but they are at least a tie with the TP45c's in my estimation. Wow,actually.
So impressed was I, I just ordered two more.
I think this companies in it for the long haul. I think I'll follow along . Doug

I have a couple of Haiyin packs I have been wringing out as well. So far, VERY impressed. They will be my packs of choice from here on out. I have a feeling TP and Hyperion will be needing to lower their prices soon as companies like Haiyin catch up with them in quality and far exceed them in price point value.

Originally Posted by sailr

I have a couple of Haiyin packs I have been wringing out as well. So far, VERY impressed. They will be my packs of choice from here on out. I have a feeling TP and Hyperion will be needing to lower their prices soon as companies like Haiyin catch up with them in quality and far exceed them in price point value.

The Haiyin's are impressive so say the least.

I only have 3S 500s and 800 and they are OK but not outstanding in fact a less expensive brand ( $6.43(has better performance .

http://www.rcgroups.com/forums/showp...79&postcount=2

As I posted earlier in this thread their small LiPoly are not that great of a deal especialy compared to their larger ones.

http://www.rcgroups.com/forums/showp...0&postcount=81

Charles

There comes a time when you have to quit being a looky-loo and just order your own batteries and go fly. Thats just what I did today. I ordered some 6S 5000's, 5S 5000's and 3S batteries coming. All 40C.


The 6S 5000's are going into a Habu32 and the others in various planes I have.

I'll let you guys know how it goes!