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Old 04-29-2013, 12:56 AM   #256
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Sometimes, you just don't know what whoever pit next to you are doing. I bring my kid to race all the time. Thought bad words around the pit area was bad influence for kids? Now, this really concerns me. Really need to risk ourselves for the toy cars at club level?

A while back, someone burned down half of the house from charging lipo in the garage.
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Old 04-29-2013, 02:14 AM   #257
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Sometimes, you just don't know what whoever pit next to you are doing. I bring my kid to race all the time. Thought bad words around the pit area was bad influence for kids? Now, this really concerns me. Really need to risk ourselves for the toy cars at club level?

A while back, someone burned down half of the house from charging lipo in the garage.
i bring my kid to the race track all the time too and i also assume that there are dangers involved with our hobby, lipo's are not toys. i put them in lipo bags and charge them. for the most part the people that charge @ these rates are racing of the very top levels and are winning major titles and national and inter-national races. they do push there equipment to the maximum and that includes the batteries. that is there choice and they are not telling anyone to or encouraging to do this. it is information and sharing there experience.
i personally love the read about what others are doing and what they do. i totally understand the it is cutting edge and pushing the envelope at club level this might be over kill.

lipo fire happen all the time (youtube 38,900 results) i have personally never seen a fire from someone at a race or major event. most of the time it is someone that has misused them and that is way more dangerous then what is being discussed here.


but it is awesome and thank's from all the info.
theses are my personal opinions and i hope it doesn't offend.
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Old 04-29-2013, 02:28 AM   #258
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Time to get rid of old packs too... If you ain't usin'em, dump'em.
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Old 04-29-2013, 03:45 AM   #259
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Smile Charging lipos

I have the powerlab8 & have Been charging @ 32amps for the last couple of years,same battery's,one of them started showing higher ohms over time & I cycled it 3 times,its been great ever since,I do however graph all my charges,so you can see how well the battery is charging over time.
Have just brought some 2s 5300mah lipos with a charge rate of 12c,my powepak puts out 47amps,24 volt.
If the battery is rated for a high charge & it's done in a safe manner,why not use it to its full potential?
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Old 04-29-2013, 07:20 AM   #260
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For sure! I'm going to invest in a lipo sack inside of a cash box!
A "steel" cash box is all you need. The lipo sack is made of fabric material that will just fuel the fire if it ignites.

ROAR and another sanctioned races should adopt steel boxes instead of fabric Lipo bags which are no guarantee that they will contain a Lipo fire.
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Old 04-29-2013, 11:53 AM   #261
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Originally Posted by kiwipete View Post
I have the powerlab8 & have Been charging @ 32amps for the last couple of years,same battery's,one of them started showing higher ohms over time & I cycled it 3 times,its been great ever since,I do however graph all my charges,so you can see how well the battery is charging over time.
Have just brought some 2s 5300mah lipos with a charge rate of 12c,my powepak puts out 47amps,24 volt.
If the battery is rated for a high charge & it's done in a safe manner,why not use it to its full potential?
I guess my question would be: Which brands (specifically) can handle high amperage charging? SMC? EA? Promatch? Fantom?
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Old 04-29-2013, 01:55 PM   #262
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so which one, powerlab or icharger???
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Old 04-29-2013, 02:07 PM   #263
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Power lab 8 & TP lipos work for me.
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Old 04-29-2013, 03:21 PM   #264
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If you have a dummy load (I.e light bulb discharger or resistors) it will do 1400w per channel , or 2000w synchronized mode. or you can do a regenritive discharge. So it can discharge at 476 amps for a 1cell............. really test those "c" ratings.
Good reminder on the regen and external load capability. But isn't it still limited to 40 amps (70 synced)?
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Old 04-29-2013, 03:50 PM   #265
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If you have a dummy load (I.e light bulb discharger or resistors) it will do 1400w per channel , or 2000w synchronized mode. or you can do a regenritive discharge. So it can discharge at 476 amps for a 1cell............. really test those "c" ratings.
I knew you could do the regen with a big battery but didnt know you could use bulbs or resistors. You know exactly how to do it with those?

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Old 04-30-2013, 03:24 AM   #266
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i charge to the MAH of the pack, so for 5000mah i charge 5a. for 1100 lipo receivers i charge 1.1a
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Old 04-30-2013, 04:55 AM   #267
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I always charge at 10Amp 6200mah packs.
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Old 04-30-2013, 06:41 AM   #268
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it can discharge at 476 amps for a 1cell............. really test those "c" ratings.
I'll be the first to call BS on this. No solder connection is going to survive sustained discharge current like that. At least not for more than a few milliseconds. The traces on the circuit board won't survive that either.

Go here and see the load carrying limits for AWG wire sizes.

https://www.eol.ucar.edu/rtf/facilit.../Wire_Size.htm
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Old 04-30-2013, 08:06 AM   #269
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For 476A the wire would be as big as your thumb...the #12 on the battery wont cut it.
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Old 04-30-2013, 08:18 AM   #270
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Rob and Carbon are correct. That would certainly melt solder immediately and/or burst into flames...
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