MaxAmps Race Edition Lipos - RC-Monster Forums

12.03.2010, 01:01 PM

Couple of you guys said that you would be more impressed if s standard LiPo for an RC car was used and not a larger brick pack. Well Big Squid RC actually did this back in June with one of our packs and it cranked over the car right away with ease:

http://www.youtube.com/watch?v=KfaryxeCNsI

Brandon

E-Revonut · 12.03.2010, 01:18 PM

Quote:

Originally Posted by brandonwilcox

Couple of you guys said that you would be more impressed if s standard LiPo for an RC car was used and not a larger brick pack. Well Big Squid RC actually did this back in June with one of our packs and it cranked over the car right away with ease:

http://www.youtube.com/watch?v=KfaryxeCNsI

Brandon

Although starting s real vehicle does take alot of amps it is only for a second or two and then it can rest for minutes or hours before being needed again. In an RC car or truck we may not be seeing the 200+Amp peaks but we see an average of about 30 amps for 15 minutes with regular spikes in the 150Amp range. The battery is getting a good draw on it for the duration of a run, right to the cut off. Lets see a Max Amp pack take that abuse. My last MA pack that puffed was rated at 100A continuous 200A burst, I was getting bursts of 167A and an average over the run of between 25 and 30Amps.

MindThoughts · 06:33 AM

Brandon-
How long do you think it will be until you can get the 75c Continuous Discharge Test up for us to see?

PS. Is there any posibility to have the Battery State 75c Continuous(Full Duration) and 150c 1second Burst. And to specifify that Continuous is for the full duration of the charge of the battery- and 150c is for 1second burst- Onto the wrapping of each lipo?

PS. Brandon has already stated that these 6500mah LiPo's can handle and are rated at exactly:

150c Burst for one second.
100c for ten seconds.
75c for the full charge of the LiPo.

Brandon- you must have done some testing to arrive at these numbers you gave us earlier in this thread. Is there any way you can post up the test that were already done which gave you these figures? By the way- you mention to me in a PM that you were having technical problems transfering your test over to a Digital Format(if I understood you correctly), But if you could even take pictures of different time frames of these test you performed already, and just post the pictures up- that would at least be something for us to look at. I think most of us would like to see your 75c Discharge for the full duration of the charge- Test. The 100c for ten seconds is awesome as well- The 150c 1 second burst would even be interesting to see. What are your thoughts on this? By the way- what are you using to do the 75c continuous discharge for the full duration of the charge?

Quote:

Originally Posted by brandonwilcox

Couple of you guys said that you would be more impressed if s standard LiPo for an RC car was used and not a larger brick pack. Well Big Squid RC actually did this back in June with one of our packs and it cranked over the car right away with ease:

http://www.youtube.com/watch?v=KfaryxeCNsI

Brandon

brainanator · 12.04.2010, 03:25 AM

Quote:

Originally Posted by MindThoughts

Brandon-
PS. Brandon has already stated that these 6500mah LiPo's can handle and are rated at exactly:

150amp Burst for one second.
100amps for ten seconds.
75amps for the full charge of the LiPo.

I'm not sure, but I think he said 150C, 100C, and 75C in that order, NOT amps...Huge difference.

MindThoughts · **Thank You. -** 12.04.2010, 06:30 AM

You are right, thank you. I will edit/update the post with c rather than amps. I appreciate your saying something:)

Quote:

Originally Posted by brainanator

I'm not sure, but I think he said 150C, 100C, and 75C in that order, NOT amps...Huge difference.

JERRY2KONE · **Comparison -** 12.04.2010, 06:34 AM

Actually the comparison gambit has already been done in here somewhere. Seeing more updated experiences is always a good thing. BUT the whole reason this thread was started was because of the newest claims by Maxamps for this "True 150C" race ready LiPo. So until Brandon can cough up the promised tests, graphs, and results proving its claims, we will continue to demand some kind of results. Look this was never about saving their reputation. They are the ones who advertised this battery in the fassion that is is being portrayed and we would like to know if there is any volitity to their claim or if it was purely a wet dream trying to sucker more unknowing people into their trap. If you want some level of comparison done between the rest of the batteries available then start a new thread and do some poling. This thread stands as it was originally listed "MAXAMPS RACE EDITION LIPOS"

padrino · 11:48 AM

Using the way they market as insight into how ethical they are I expect the cell manufacturer probably doesn't even rate them as 75C (note MaxAmps points out it's the cell rating, not the pack rating) however MaxAmps is assuming something to allow them to take some of the liberties they do.

No one will draw 75C continuous for any period of time from a cell or the pack, they sell to the RC community so from their point of view it's reasonable to assume that as fact.

thzero · 12.04.2010, 01:47 PM

Who knows because not one LiPo cell I've seen, granted not tons, has ever been marked the way NiCd and NiMh are with the exact specifications of the cell.

Quote:

Originally Posted by padrino

Using the way they market as insight into how ethical they are I expect the cell manufacturer probably doesn't even rate them as 75C

04:19 AM

Hey guys I think I have found a cheap way to test lipos and how much current they can really hold. I just tried a Diesel Glow Plug from a friends Toyota truck on my Turnigy 4S 5K 40C. With my clamp meter I saw just over 15A of current. I left it on for about 5min and other than the Glow Plug getting stupidly hot everything else was cool. I should have measured the voltage too but couldn't find my Fluke meter.

Now I know some might be saying "What's your point?" but this could be easy way to test what sort of currents lipos can handle. Just add a few more Glow Plugs in either series or parallel (not an expert on this) and then just see how the batts hold up temp wise and if they puff at all. A clamp type current meter would tell you exactly what sort of amps you are pulling and a simple IR temp gauge will tell you how stressed the cells get. Oh and also a visit to a wrecking yard to pick up some Diesel Glow Plugs. Maybe from a big truck they will be bigger and you would need less of them. What do you guys think? Possible?

whitrzac · 12.04.2010, 12:09 AM

Quote:

Originally Posted by brandonwilcox

Couple of you guys said that you would be more impressed if s standard LiPo for an RC car was used and not a larger brick pack. Well Big Squid RC actually did this back in June with one of our packs and it cranked over the car right away with ease:

http://www.youtube.com/watch?v=KfaryxeCNsI

Brandon

I'm sorry but this is geting stupid...

WE WANT GRAPHS!!!
nothing else...