Mosc_007

Ok. I will do some more research and see what people are saying. And what brands are exploding in a more violent manner than other brands.


Charles

cannon

iTrader: (35)

Faulure rate has been well below 5% ... that gives you an dication of the number of cells that I have handled in the last couple of years

vr01

Quite simply 5 years ago the cells we could get our hands on were CRAP. They were the ones the matchers rejected. (Matchers I mean Trinity and Orion as they pretty much got all of the cells before anybody else apparently.) The professional racers were getting cells which the average joe racer could only dream about - that doesn't appear to be happening now. What you don't know is how many cells died in the process back then so you are never going to be able to make an apples to apples comparison...

Mosc_007

Unless you test the cells for yourself how can you make a comment like that.

Why do you think I go to the trouble of testing the cells myself ?. It's so I know what the facts are. And not just believeing what people say. If you just go around believing what people say you will end up with at least %50 miss-information.

I am %100 certain the Matched IB4200's will kick the Raw RC3600HV's. And probably even kick the matched RC3600HV's.

I am %100 certain that testing the Raw RC3600HV's and Raw IB4200's at a constant discharge of 10 amps that they are equal in average voltage.

I am %100 certain the IB4200 have higher runtime than the RC3600HV's.


What do I have to do to convice some people of this. Would you like me to make a DVD of the testing process so everyone can see the facts for themselves.


Charles

Mosc_007

I agree %100 that above 10 amps the IB4200 will be better.

As for 10 amps being useless. Isn't the average current on a Tamiya 540 (Johnson) Class motor under 10 amps ?


Charles

Mosc_007

I am sorry if it sounds derogatory. It is not meant to be that way. It's just that the cells I am comparing happen to be Japanese and chinese. They could well have been two other manufacturers.

And no, Sanyo RC3600HV cells are still made in Japan. As for their consumer cells you are probably correct.


I strongly believe the Chinese will dominate the whole world in consumer products in the not to distant future. Some of the Electronics coming out of China now is The VERY best top quality equipment.

BUT, their is still the very bottom quality stuff as well. But it's only a matter of time before they improve.

I am sure that given time Intellect will improve the relaibility of their batteries. But I suppose it depends what market they are aiming at. For the general consumer market I would say they are very good products. But when it comes to RC racing batteries they have a lot of improvement to do when it comes to reliability. RC batteries get abused all the time. And they need to be special batteries designed just for that purpose. Just like Sanyo. They have their consumer batteries, They have their Industrial batteries and they have their RC batteries. 3 Completly differant battery technologies.


Charles

TWiZTiD

i have not used the new cell types yet as i have been out of rc for 3 years but just wanted to say i have had gp 3300 explode non matched or zap

the first set was because of a crash and the pack shorted the other one died on the charger but i did push the packs hard as they where not matched and didnt really care

Mosc_007

If you sold Matched batteries would you tell anyone that you considered matching them to damage the battery in any way ?


Charles

Mosc_007

Actualy they have. One of the Major suppliers of matched cells has openly admitted he has had thousands of IB4200's die during matching.

Since he has had thousands of them die during matching then obviously matching can and does damage cells when pushed too hard.


Charles

Mosc_007

Looks like I will have to buy some matched cells from you. At that low a failure rate I will be very happy. So far I have had %100 failure with matched cells bought recently.


Charles

Mosc_007

I dont know if calling them crap is being fair. As time goes on technology improves products.

From memory I think the RC3000's I bought about 7 years ago were matched by Orion. Maybe thats why they were such good cells and also cost me around $150 for each set.


Charles

Mosc_007

After thinking about that comment for a while I need to modify it.

As time goes on Technology "Usualy" improves products.

I have to modify that based on my 27 years of experiance in engineering in the manufacturing industry. I have to say that in the last 5 years the Reliability on manufacturing machiney has been decreasing.

Initial purchase costs have been falling dramaticaly. Repair costs have been increasing and downtime has also been increasing.


Charles

Mosc_007

The one that exploded in the car, did it destroy the car during the explosion or was it just a small explosion ?


Charles

mick_waite

If a virgin is giving advice about sex, I'll listen because I enjoy a good laugh. If I actually needed advice I would make sure I asked someone with experience and knowledge. Your wild leaps of logic are truly Pythonesque.

You guessed it. I don't believe much of what you say.

And the chances of lifting this thread up to a level of 50% information is pretty bloody slim. Mind you, given you obviously consider two cells in four packs a 50% failure rate, I guess your idea of 50% infomation is what the rest of us would call approximately 8.33% information, so this thread might just scrape in.

Please, whatever you do, please don't stop this thread. I'll need a laugh tomorrow too!

Mick

Mosc_007

What can I say. I guess the only way people are going to beleive my test results comparing Raw RC3600HV's to Raw IB4200's at a 10 Amp discharge is to make my DVD and post it on a server so all can watch the test for themselves.

Actualy,
In the Failed GP3700 set. ALL 6 cells are only about %60 Capacity. All were 0.5 volts on arrival. The average discharge voltage is very poor. BUT the internal resistance is still VERY good.

In the failed IB4200 set. 2 Cells were Zero volts and 4 were under 0.7 volts. Obviously I didnt do any tests on them as I returned them for a refund straight away.

According to other experts if a NiMH cell voltage is under 0.9 volts it will have reduced cell capacity. This is the Storage voltage. Not the voltage just after or during discharge.

12 cells from 12 cells is a %100 failure rate. Unless my maths is wrong.


Charles