EBAY Battery Packs - Any Experience?
06-22-2009, 10:53 PM
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RE: EBAY Battery Packs - Any Experience?
ORIGINAL: amorak
I agree with respect to something as complex as a car, but some NiMHbatteries shouldn't be beyond the Chinese?
Iam basically hoping that someone whos tried these can tell me if their any good, or if Ishould keep looking?I realize a 6800mah Chinese pack wont give me 6800, but even if it gave me 70%of it it would still be 4800mah
I agree with respect to something as complex as a car, but some NiMHbatteries shouldn't be beyond the Chinese?
Iam basically hoping that someone whos tried these can tell me if their any good, or if Ishould keep looking?I realize a 6800mah Chinese pack wont give me 6800, but even if it gave me 70%of it it would still be 4800mah
06-23-2009, 12:04 AM
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RE: EBAY Battery Packs - Any Experience?
ORIGINAL: Druss
I guess it was...
ORIGINAL: amorak
I agree with respect to something as complex as a car, but some NiMHbatteries shouldn't be beyond the Chinese?
Iam basically hoping that someone whos tried these can tell me if their any good, or if Ishould keep looking?I realize a 6800mah Chinese pack wont give me 6800, but even if it gave me 70%of it it would still be 4800mah
I agree with respect to something as complex as a car, but some NiMHbatteries shouldn't be beyond the Chinese?
Iam basically hoping that someone whos tried these can tell me if their any good, or if Ishould keep looking?I realize a 6800mah Chinese pack wont give me 6800, but even if it gave me 70%of it it would still be 4800mah
btw, it's "I guess it is."
06-23-2009, 08:09 PM
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RE: EBAY Battery Packs - Any Experience?
They are about 3000-3300. I cycled C < D one of them and got bored with it.
2990/2852
3245/2724
3223/2797
3220
2990/2852
3245/2724
3223/2797
3220
06-23-2009, 09:53 PM
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RE: EBAY Battery Packs - Any Experience?
ORIGINAL: guver
That's why I bought two. [
][X(]
That's why I bought two. [
][X(]
-Disjaukifa
06-24-2009, 09:38 AM
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RE: EBAY Battery Packs - Any Experience?
During the 30 amp test the voltage at the BATTERY'S lead (before tamiya connector) ran +.3 volts compared to the graph. The tamiya connector was 150 ° F. For comparison the powerpoles ran about 95 ° F.
During the 40 amp test the voltage differential ran .4 volts compared to the graph. The Tamiya was 200 ° and the end battery bar was 280 ° and the battery leads were about 250 °
You didn't think I was going to leave it at 10 amps did you? [sm=50_50.gif] Right after the test a cell vented and poofed out smoke , but I couln't grab the camera quick enough. I rather enjoyed this test.
During the 40 amp test the voltage differential ran .4 volts compared to the graph. The Tamiya was 200 ° and the end battery bar was 280 ° and the battery leads were about 250 °
You didn't think I was going to leave it at 10 amps did you? [sm=50_50.gif] Right after the test a cell vented and poofed out smoke , but I couln't grab the camera quick enough. I rather enjoyed this test.
06-24-2009, 10:16 AM
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RE: EBAY Battery Packs - Any Experience?
ORIGINAL: guver
During the 30 amp test the voltage at the BATTERY'S lead (before tamiya connector) ran +.3 volts compared to the graph. The tamiya connector was 150 ° F. For comparison the powerpoles ran about 95 ° F.
During the 40 amp test the voltage differential ran .4 volts compared to the graph. The Tamiya was 200 ° and the end battery bar was 280 ° and the battery leads were about 250 °
You didn't think I was going to leave it at 10 amps did you? [sm=50_50.gif] Right after the test a cell vented and poofed out smoke , but I couln't grab the camera quick enough. I rather enjoyed this test.
During the 30 amp test the voltage at the BATTERY'S lead (before tamiya connector) ran +.3 volts compared to the graph. The tamiya connector was 150 ° F. For comparison the powerpoles ran about 95 ° F.
During the 40 amp test the voltage differential ran .4 volts compared to the graph. The Tamiya was 200 ° and the end battery bar was 280 ° and the battery leads were about 250 °
You didn't think I was going to leave it at 10 amps did you? [sm=50_50.gif] Right after the test a cell vented and poofed out smoke , but I couln't grab the camera quick enough. I rather enjoyed this test.
Thanks
Disjaukifa
06-24-2009, 10:55 AM
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RE: EBAY Battery Packs - Any Experience?
It proves nothing and is simply an arbitrary number I selected for comparisons. 30 amps looks safe (just barely) and 40 amps is definately too high. These batts are very much like any other 3000 mah generic e-bay type packs and would be fine for slower or lighter vehicles that run for over 15 minutes on 3000 mah. For heavier apps it is recommended to replace the end battery bar with a heavy bar and the connector with a Dean's,powerpole,traxxas. I generally use 10 amps for all my subC packs and that makes it easy to compare with overlaid graphs. The bottom line is not to expect 6800 out of these , only 3300 mah.
06-24-2009, 11:43 AM
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RE: EBAY Battery Packs - Any Experience?
ORIGINAL: guver
It proves nothing and is simply an arbitrary number I selected for comparisons. 30 amps looks safe (just barely) and 40 amps is definately too high. These batts are very much like any other 3000 mah generic e-bay type packs and would be fine for slower or lighter vehicles that run for over 15 minutes on 3000 mah. For heavier apps it is recommended to replace the end battery bar with a heavy bar and the connector with a Dean's,powerpole,traxxas. I generally use 10 amps for all my subC packs and that makes it easy to compare with overlaid graphs. The bottom line is not to expect 6800 out of these , only 3300 mah.
It proves nothing and is simply an arbitrary number I selected for comparisons. 30 amps looks safe (just barely) and 40 amps is definately too high. These batts are very much like any other 3000 mah generic e-bay type packs and would be fine for slower or lighter vehicles that run for over 15 minutes on 3000 mah. For heavier apps it is recommended to replace the end battery bar with a heavy bar and the connector with a Dean's,powerpole,traxxas. I generally use 10 amps for all my subC packs and that makes it easy to compare with overlaid graphs. The bottom line is not to expect 6800 out of these , only 3300 mah.
-Disjaukifa
06-24-2009, 11:51 AM
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RE: EBAY Battery Packs - Any Experience?
During the 40 amp test the voltage differential ran .4 volts compared to the graph. The Tamiya was 200 ° and the end battery bar was 280 ° and the battery leads were about 250 °
I can run my Clod on my 2500mah Trinity battery packs and they get extremely hot. The last time I measured it was at 145 degrees. My 4200mah batteries from All-Batteries which are tenergy batteries I have never seen get hotter than 110 degrees.
06-24-2009, 12:11 PM
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RE: EBAY Battery Packs - Any Experience?
ORIGINAL: FairTax4me
Yeah those little end bars they put on stick packs don't hold up to much. I've melted a few.
Despite the Reference pack probably being the better quality pack the Tenergy is still able to provide more current (higher amp rating) so it will naturally run cooler.
During the 40 amp test the voltage differential ran .4 volts compared to the graph. The Tamiya was 200 ° and the end battery bar was 280 ° and the battery leads were about 250 °
I can run my Clod on my 2500mah Trinity battery packs and they get extremely hot. The last time I measured it was at 145 degrees. My 4200mah batteries from All-Batteries which are tenergy batteries I have never seen get hotter than 110 degrees.
-Disjaukifa
07-11-2009, 03:08 PM
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RE: EBAY Battery Packs - Any Experience?
In case anyone wonders, I did e-mail the seller , informed them that the packs were only 3000 mah and got an excuse, an appology, and a refund. I returned the 2 packs to them.
And, as suspected they continue to sell as a 6800 pack to unsuspecting buyers. http://cgi.ebay.com/7-2V-6800mAh-Ni-...3A1%7C294%3A50 The price isn't too bad for what you get , but it burns me to have them label it as a 6800. I'd venture a guess that all the subC batteries they sell are the same capacity. Seller onlinepearl .
And, as suspected they continue to sell as a 6800 pack to unsuspecting buyers. http://cgi.ebay.com/7-2V-6800mAh-Ni-...3A1%7C294%3A50 The price isn't too bad for what you get , but it burns me to have them label it as a 6800. I'd venture a guess that all the subC batteries they sell are the same capacity. Seller onlinepearl .
07-18-2009, 12:35 PM
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RE: EBAY Battery Packs - Any Experience?
I thought it may be nice to overlay the "6800" packs from China with some "4500" packs from China. The three graphs to the right are the acepow pack that is advertised correctly as 4500 , the three shorter graphs on the left are the e-bay packs that are mislabeled as 6800. Higher capacity is to the right (longer ruintime)
10,20,30 amps.
10,20,30 amps.
07-21-2009, 08:56 PM
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RE: EBAY Battery Packs - Any Experience?
Ihave had good luck with these. I have four of them. Long runtimes, albeit they get a bit toasty on discharge and a 3.8A charge with my Accucell-6. Still, not bad.
http://cgi.ebay.com/Two-RC-7-2V-3800...3A1%7C294%3A50
http://cgi.ebay.com/Two-RC-7-2V-3800...3A1%7C294%3A50
