opinions about batteries....

[zeropointbug]

I have been reading people that have not much good to say about Gens Ace packs on 'airplane/heli' forums like RCGroups. I know planes are alot more stressful on lipos than land vehicles, but I think that it is a good test for them to pass if you ask me. Turnigy Nano-tech's are garbage as well, the regular turnigy packs have just as much punch, but last much longer apparently?

If anyone cared to look at that graph, you can see that the small 2200mah 45C pack from hyperion can do 41C Cont. discharge (90A) while delivering 80% of capacity... or a 32C discharge (70A) while delivering 95% capacity and staying above 3.6V/cell for almost entire discharge.

[Bondonutz]

Careful Jay, He'll come equiped with a Hyperion pack with MA flamed heatshrink.

[zeropointbug]

Brandon, please, if you want us to see what your MA packs can do, go to RCGroups and contact the user "Everydayflyer" he has tested many many packs, all with very nice discharge equipment. He has shown how the whole C rating hype between brands is nothing but a selling tool, and has proven that a good quality ~35C packs can outperform a 50C + pack from another brand. He will get us discharge curve, pulse discharge, temperature, and usually some cycle life graphs... I personally have never seen a discharge graph for an MA packs, so that seems to me like a very good opportunity to put this whole C rate thing to rest.

[jayjay283]

Brandon - I live 45 min n/w up the 90 right by arlington park horse track. What r/c car do you drive ?

Bondo- hehe


zeropointbug Brandon, please, if you want us to see what your MA packs can do, go to RCGroups and contact the user "Everydayflyer" he has tested many many packs, all with very nice discharge equipment. He has shown how the whole C rating hype between brands is nothing but a selling tool, and has proven that a good quality ~35C packs can outperform a 50C + pack from another brand. He will get us discharge curve, pulse discharge, temperature, and usually some cycle life graphs... I personally have never seen a discharge graph for an MA packs, so that seems to me like a very good opportunity to put this whole C rate thing to rest.

even better idea

[zeropointbug]

http://www.beatyourtruck.com/forum/s...a-Maxamps-pack

Looks like SuicideNeil posted a discharge graph on beatyourtruck.com forum. The Gens Ace pack definitely outperforms the MA pack, and cost 1/4 the price.

[BrianG]

Hmm, I wonder why MA hasn't threatened that site with litigation? After all, it's against the law to speak the truth.

[FG101C]

I was thinking of getting a Hyperion G3 pack for my Truggy. Looking at the 4200mah 5s pack. Should I go VX or EX? VX should be enough right, no way a Truggy is going to pull 147 amps continuous would it? This is a track only vehicle.

Thanks.

[zeropointbug]

Originally Posted by FG101C

I was thinking of getting a Hyperion G3 pack for my Truggy. Looking at the 4200mah 5s pack. Should I go VX or EX? VX should be enough right, no way a Truggy is going to pull 147 amps continuous would it? This is a track only vehicle.

Thanks.

Looking at discharge graphs from everydayflyer on RCGroups, who has done hundreds of cycles on many different brand packs; the EX G3's look like they have pretty good increase in punch over the VX packs, which already are awesome packs. I have am about to purchase some 6s 2200 45C EX packs for racing this year, he shows these packs have a ~2.0 mohm per cell IR, compare this with ~1.4 mohm per cell IR for the 4200 35C VX packs which Mike just mentioned. Really though, if you are going to get a medium to large pack, then VX is plenty... the only reason I went with EX is because the pack is quite small, and I will be using up to 40C peak draw.

Lower cell IR = performance

[zeropointbug]

Originally Posted by BrianG

Hmm, I wonder why MA hasn't threatened that site with litigation? After all, it's against the law to speak the truth.

Isn't that true.

[zeropointbug]

http://www.rcgroups.com/forums/showthread.php?t=1242354

Here is the thread on a G3 EX 45c 2200 pack, lot's of graphs.

It can hold 3.5v/cell @ a 40c + discharge; and @ 23c discharge, it's only 122F, that's 2.5 mins from 100% to 90% DOD. It appears, looking through his other battery tests, the 2200 size pack (and maybe 2600) have the highest performance per mah capacity in the G3 line up.

[RC-Monster Mike]

I use the 4200mah VX 35/65c Hyperion packs in my buggy and truggy race trucks - awesome packs.

[crazyjr]

Does anyone know If Hyperion and flightpower are still enerland based?

I wish Mike still had the ones he was having made, They were the real bang for the buck for quality and performance

[zeropointbug]

Nope, I can't remember the manufacturer name, but if a user on RCGroups is to be believed, he said Hyperion and TP use the same cells. I am just going on what he said, this sort of information is sort of kept on the down low.

[zeropointbug]

Going through Everydayflyer's post on battery testing, if I am reading the graph accurately, it looks like Hyperion 45C EX packs actually outperform the TP 65C packs. Check it out, tell me if I am crazy. If you want, go back and look at the 90A G3 graph I posted a couple pages back...

[nativepaul]

Two quotes from Charles on RCG:-

Re TP 65c 2250mAh:

IRs approx. 1.6 but they are still dropping. They were 2.3 after the first 4A charge form storage.

Re Hyp 45c 2200mAh:

3rd.Chr. on Cell Pro 10 at 5A IRs 3.6 / 3.7
4th. Chr. Cell Pro 10 at 7.2A 2.6 / 2.7

And a quote from you on page 2 of this thread:

Pack IR is actually the only story as far as performance goes.

If you are both right, the TP pro power 65c cells are about 50% better than the Hyperion EX G3 45c cells. The graphs don't shout that out to me, but maybe its the comparison between 2s and 3s packs, and the fact that the 2V or so that we're concerned with occupies so little hight its not easy to compare them.