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Discussion Starter #1
apparently nothing.

two 2400 mah cells rated @ 40c packed inside a unit rated at 4900 mah and 50+C, wired in parallel.

Why did I take it apart????

I was testing the packs, pump them up to 4.22 @ 1 amp on T35BL before discharging. First seven times went fine, redid a pack as a control, I fell asleep at the computer. I took it off at 4.55v and puffed......but didn't burn the house down.

Yes, I'm a dumba$$ for that.

But I did always find it weird a 40C and 50C pack from same company tested identical @ 35 amps, now I know why.

XXX784283
3.7V/40C
2400mah
2009.07.07

I'll have pics later, camera is in the garage and it's snowing.
 

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your a brave man

I have 2 packs 25c and 40 c NFD!!!!!! on the track they work just the same and finish the same Another Big HYPE.
Oh Oh . Do not even bother with testing them.
25c sat all summer put it inthe car a boom just perfect.
Love this LIPO!!! No more battery work Yippee. just work on my car and what do you know it has gotten better.
MY 2 cents
Dan
b-mainer
 

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apparently nothing.

two 2400 mah cells rated @ 40c packed inside a unit rated at 4900 mah and 50+C, wired in parallel.

Why did I take it apart????

I was testing the packs, pump them up to 4.22 @ 1 amp on T35BL before discharging. First seven times went fine, redid a pack as a control, I fell asleep at the computer. I took it off at 4.55v and puffed......but didn't burn the house down.

Yes, I'm a dumba$$ for that.

But I did always find it weird a 40C and 50C pack from same company tested identical @ 35 amps, now I know why.

XXX784283
3.7V/40C
2400mah
2009.07.07

I'll have pics later, camera is in the garage and it's snowing.
what brand?
 

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So you are basically saying that Company X lied to consumers about a product they put out, and you have the proof right?

Interesting, yet not surprising at all to me. It happens everyday unfortunately.
 

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Discussion Starter #11
40C.....really now, sticker on the outside said 50C+







Sorry for the blur.....but the hand writing reads

D7A 40C/someone's initials????

 

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Discussion Starter #12
http://www.hobbytalk.com/bbs1/showpost.php?p=2996526&postcount=138

http://www.hobbytalk.com/bbs1/showpost.php?p=2996526&postcount=139

Verifies my findings, which I stated back in late September........

CE T35BL Stealth @ 35 amps.

SMC......40c.......50c
0.........4.20.......4.20
30.......3.91.......3.89
60.......3.87.......3.84
90.......3.82.......3.80
120......3.78.......3.76
180......3.71.......3.70
240......3.66.......3.65
300......3.62.......3.61
360......3.60.......3.59

IR.........3.8.........3.8
mah.....5055.......4968
RT........520........511
Avg V....3.66.......3.65
 

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Would be curious to see what's inside the "fresh batch" of those 50C packs that have been floating around the last month or so. They cycle with higher voltage, lower IR, and run night and day above the "early batch", but the case looks the same...
 

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I had one of these packs swell up during a 30A discharge on my T35bl.:( Figured it is junk now and opened it up, same thing, 2400 40C on the inner labels.:eek:
 

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Let's take the other side for just a moment.

Did you cycle the pack to confirm the 4900 maH?

Did you cycle the pack @ 50C to confirm the rating?

If these were early packs, they could have been hand picked by the manufacturer and tested as 4900 50C packs.

It does not look good but then again you did not purchase the pack as (2) 2450 cells each rated for 50C, you purchased the pack rated at 4900 and 50C.

FWIW I have no affiliation with any battery company since Terry Brown @ Whiplash stopped doing cells. :)
 
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