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Old 07-25-2013, 03:21 PM   #376
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Originally Posted by Tanis103 View Post
What's the highest rate I can charge at for a Protek 1S, 5,800mah, 100c, pack for 12th scale? I'm in need of saving time between heats. I have a icharger 206b with a 20amp power supply rated at 350 watts.

Thanks,
What C rate does the manufacturer web site say you can charge them at?
1C? 2C?
Multiply the C rate by 5.8.
Example: if 2C, then 11.6 amps.
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Old 07-25-2013, 03:43 PM   #377
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5.55C seems to be the way to go.... 5.8C is good too....
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Old 07-25-2013, 03:46 PM   #378
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5.55C would be a 32.19 amp charge rate on a 5800 mah pack.
(5.55 x 5.8)
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Old 07-25-2013, 03:56 PM   #379
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Yes 32amps, and the time it takes to fully charge from a discharged state should be between 12 and 14 Minutes... If it takes less than 12Minutes to charge, then lower the amperage, and if it takes more than 14 Minutes to charge, increase the amperage.... If your equipment can't do 32 amos, than charge at close to max possible amperage....
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Old 07-25-2013, 03:59 PM   #380
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And if the lipo can only take a 2C charge, better have the fire department on speed dial

I am not familiar with that lipo, maybe it can take a 6C charge?
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Old 07-25-2013, 04:02 PM   #381
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From A Main...
Maximum Charge Rate: 2C (11.6A)

And his power supply is 20a and you don't want to pull more than about 90% of what its rated at max.
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Old 07-25-2013, 04:04 PM   #382
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I thought you guys were using the Tp 6c+ lipos...
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Old 07-25-2013, 04:06 PM   #383
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With a 2c limit, I would not charge over 8amps...
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Old 07-25-2013, 04:29 PM   #384
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Quote:
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With a 2c limit, I would not charge over 8amps...
12 Amp charge rate is the magic number...
Discharge at 30 amps to put a little heat into the cells, then charge.
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Old 07-25-2013, 06:14 PM   #385
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Thanks guys, just got back from the track.
1st, charged at 12 amps, took 19 mins, battery was not warm.
2nd, charged at 12 amps, took 18 mins, battery was not warm.
3rd, charged at 15 amps, took 14 mins, battery was not warm.

I'm happy with this, it use to take 50 to 55 mins to charge my pack at 5 amps on my Venom charger after a 6 min heat.
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Old 07-25-2013, 07:13 PM   #386
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12 Amp charge rate is the magic number...
Discharge at 30 amps to put a little heat into the cells, then charge.
What is interesting for me is with the icharger I'm not able to discharge more then 19.2 amps, I can set the icharger to 30 or more, but the battery will not give up more then 19.2... It is 100c Revtech....
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Old 07-25-2013, 07:54 PM   #387
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What is interesting for me is with the icharger I'm not able to discharge more then 19.2 amps, I can set the icharger to 30 or more, but the battery will not give up more then 19.2... It is 100c Revtech....
If it's anything like the PowerLab you need to connect to a car battery to get that high of a discharge rate.
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Old 07-26-2013, 09:32 AM   #388
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Originally Posted by fq06 View Post
If it's anything like the PowerLab you need to connect to a car battery to get that high of a discharge rate.
I'm using a 47amp Power supply.....
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Old 07-26-2013, 09:39 AM   #389
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I've read that you need to supply 20-24v instead of the standard 12v a server PSU supplies. Don't know how true that is bc I don't have any of those chargers, but I know some people that use two PSUs in series for 24v
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Old 07-26-2013, 09:57 AM   #390
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Quote:
Originally Posted by Tanis103 View Post
Thanks guys, just got back from the track.
1st, charged at 12 amps, took 19 mins, battery was not warm.
2nd, charged at 12 amps, took 18 mins, battery was not warm.
3rd, charged at 15 amps, took 14 mins, battery was not warm.

I'm happy with this, it use to take 50 to 55 mins to charge my pack at 5 amps on my Venom charger after a 6 min heat.
Did you notice that the IR went down really low.

Seems to me that if the battery gets too hot IR increases or to cold IR
increases.
8-9 degrees above ambient temperature is key.
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