Is Maxamps any better now? - Page 3 - RC-Monster Forums

JERRY2KONE · **Get to the root of the problem. -** 01.17.2009, 10:32 AM

Quote:

Originally Posted by asheck

Better then the old 20c over rated,over priced ,powder puff packs.Yes.

So I guess the question still has not been answered. Does anyone with experience know if the new packs are any good, or still the same crapp as the 20C packs????? ANYONE???

starscream · 01.17.2009, 10:57 AM

Quote:

Originally Posted by JERRY2KONE

So I guess the question still has not been answered. Does anyone with experience know if the new packs are any good, or still the same crapp as the 20C packs????? ANYONE???

Im no math genious but I'd say these packs are 33% better than before

George16 · 01.17.2009, 11:16 AM

I would not risk my money just to try these batteries when I know I have good luck with Neus and Polyquests.

slash_48 · 01.17.2009, 01:08 PM

I have a 2s 6500 30c hard case and a 6000 3s. Haven't had a problem with them at all. But I won't say they are better than any other brand or any worse. I'm happy with mine.

Dagger Thrasher · 01.20.2009, 07:09 AM

Lol! That is the most pathetic excuse.

"Sorry, but at this time we don't want the competition to see what we have."

Paraphrased:
"Sorry, but I know this cell doesn't perform up to scratch and don't want to show a discharge graph in case people realise how poor the cell really is, and buy better packs from the competition."

At least, that's my take on it...

sikeston34m · 01.20.2009, 09:05 AM

Quote:

Originally Posted by Dagger Thrasher

Lol! That is the most pathetic excuse.

"Sorry, but at this time we don't want the competition to see what we have."

Paraphrased:
"Sorry, but I know this cell doesn't perform up to scratch and don't want to show a discharge graph in case people realise how poor the cell really is, and buy better packs from the competition."

At least, that's my take on it...

I aggree!

It is this type of talk that makes what is going on "behind the scenes" pretty obvious!

Refer to the link in post #5 of this thread. It shows a discharge graph of a "35C" cell. In reality, it isn't even a 25C cell. What does that tell you about what they are hiding from the "competition" concerning the 30C cell?

I'm planning on getting back into Ebay soon to sell off some of my RC stuff that's I've collected. With the funds from that, I think I will invest in some discharge, data collecting equipment.

If you guys want an unbiased 3rd party to do discharge testing and reporting, I think I will volunteer.

There has to be a way to come up with a standardized method of testing. A "yard stick" if you will.

sikeston34m · 01.20.2009, 09:14 AM

I believe a Continous C rating should be one that doesn't harm the Lipo AND doesn't drastically reduce the cycle life of the battery.

This would mean that it holds 3.3 - 3.4 volts per cell under that load for 75% of it's discharge cycle without heating up to a critical level.

This could even be 3.5 volts per cell. Volts per cell under a load should be whatever is aggreed upon. (I smell a heated controversy just coming to a decision on that one. LOL)

Testing is to be done under controlled conditions. Same airflow around the cell during discharge and conducted at the same ambient temperature.

What are some of the options for discharge equipment? I need some help answering this. Please feel free to post or pm me with more information on this.

johnrobholmes · 01.20.2009, 10:49 AM

The big issue with 10c lipos is that they can burst 12 to 15c before falling flat. IF you never even hit the continuous rated current you are fine, but there isn't much overhead room.

I would rather run a 20c 4000 than a 10c 8000. If 4000mah wasn't enough runtime I could just keep a pack ready to swap out :D

01.20.2009, 10:58 AM

Quote:

I would rather run a 20c 4000 than a 10c 8000. If 4000mah wasn't enough runtime I could just keep a pack ready to swap out :D

I'm the opposite.Reason being is that even though they are both rated the same amps,If you only had to drain the 8000 for 4000mah it should be capable of probably 100 amps constant and hold better voltage.I know my 8000mah 12c SPC has pushed my E-revo to 52 mph,on 4s.They have to be able to hold voltage under some serious load to that.Even after 20 minutes they will still hit 50.

johnrobholmes · 01.20.2009, 11:38 AM

My reasoning is the burst, and partially the weight. Most 20c packs will take 35 to 40c before falling flat. Most 10c packs will take 12 to 15c. Dont get me wrong, I have my fair share of 10c and 12c packs that still get used plenty. They do have a place for bashing and lower amp draw use.

On my ebike I have 12s2p 4.4ah 25c packs. 110a continuous available, the packs never see more than 35 or 40a. This way they should last a very long time.

lincpimp · 01.20.2009, 11:43 AM

I have had very good use out of my 12c 3600mah polyquest cells. Still use them in my supervee boat, 8 cells in a 2s2p config for 4s 7200 mah and around 86amp cont. Plenty for that boat as it only does about 3/4 hp so only needs around 40amps. My reserve does provide better punch though, and the weight does help the boat out, as it is designed to run 12nimh cells.

Now they are old tech, and just as big and heavy as a 5000 25c pack. I prefer the lightest pack I can get away with, as weight makes the biggest difference to vehicle performance.

johnrobholmes · 11:50 AM

That is what I have, the 10 and 12c poly 3600's. I throw them in my f-350 or twarg for hours and hours of playtime. In the pede they don't hold up so well. In the emaxx it is just plain sad.

BrianG · 01.20.2009, 12:04 PM

I like running a higher C rate battery because you are not pushing the cell to its limits. Therefore it will last longer. Not only that, but voltage is more steady.

The only time I use a low C rate battery is if I have high mAh to compensate and want runtime rather than reduced weight.

johnrobholmes · 01.20.2009, 02:57 PM

I personally don't like the low rate cells on my crawlers. I tend to run hot setups, and I have puffed many 12C 2100 packs. 25C 1300s are my favorite small pack, and 25C 2200s are my favorite larger pack on a crawler.

lincpimp · 01.20.2009, 05:23 PM

Quote:

Originally Posted by johnrobholmes

I personally don't like the low rate cells on my crawlers. I tend to run hot setups, and I have puffed many 12C 2100 packs. 25C 1300s are my favorite small pack, and 25C 2200s are my favorite larger pack on a crawler.

What i would like to see is a 4000mah 10c lipo in that is the same size as the maxamps old 2100 pack, or possibly smaller... Still good for 40 amps, but twice the runtime. Not sure if that is possible, but the newer chemistry may be able to do something like that.

Quote:

Originally Posted by E-Revonut

Am I reading this right? Linc is still using MA packs? Even though your not stressing them I'm still surprised that your admitting to using them!

Yep, the 2100 cells are the only ones that have lasted. I will say that most of them are a mixture of good cells from other packs that puffed, and they go way out of balance even on a crawler. But they were basically free and they fit all of my crawlers really well.

Did I mention they were almost free? I have maybe 80 bucks in 15 2100 cells, and i may have a spare cell or two laying around... 5 bucks a cell is cheap, considering what they sell for new...

If I replace them I have some fp 2170 3s packs that will be used. About the same size and twice as powerful.