Who charging 20+ amps or more now??
09-03-2013, 06:07 PM
#452
Danny at SMC says 2c is the best balance of speed and quality of charge. You can go to 3c if in a hurry but no more than 3c even if the pack allows it.
I think it really depends on your charger. If you have a PowerLab or comparable, run what you want. If you have a run of the mill charger, stay within his guidelines.
I think it really depends on your charger. If you have a PowerLab or comparable, run what you want. If you have a run of the mill charger, stay within his guidelines.
09-03-2013, 07:16 PM
#454
I know a couple guys that have that one and its a good charger as far as a quality charge. But your limitation may be your power supply, and the max 150w charge rate as far as speed goes.
It with do a 12a charge on a 2 cell pack, but the 150w rate will be a limitation for 4 or higher cell count. You may see a max charge amperage of about 10a charging a 4 cell pack where you might see the max 12a charging a 2 cell.
Amps = Watts / Volts
So 150 watts/14.8v (nominal) for a 4 cell= 10.13 amps.
It will do what it will do and make sure your power supply can provide at least 120% of what the charger can ask for at a minimum. You don't want to max out your power supply.
180 watts, 14.5a and 16v minimum for the power supply. Voltage is a wild card, the higher the amps, the lower the voltage it will pull. Wattage and amperage is the most important in the power supply and the decent ones are 18v.
Disclaimer:
This was a brain dump... someone correct me if I'm wrong on any of this.
It with do a 12a charge on a 2 cell pack, but the 150w rate will be a limitation for 4 or higher cell count. You may see a max charge amperage of about 10a charging a 4 cell pack where you might see the max 12a charging a 2 cell.
Amps = Watts / Volts
So 150 watts/14.8v (nominal) for a 4 cell= 10.13 amps.
It will do what it will do and make sure your power supply can provide at least 120% of what the charger can ask for at a minimum. You don't want to max out your power supply.
180 watts, 14.5a and 16v minimum for the power supply. Voltage is a wild card, the higher the amps, the lower the voltage it will pull. Wattage and amperage is the most important in the power supply and the decent ones are 18v.
Disclaimer:
This was a brain dump... someone correct me if I'm wrong on any of this.
Last edited by fq06; 09-03-2013 at 07:37 PM.
09-03-2013, 08:14 PM
#456
Your power supplies voltage is 11v to 15v (probably adjustable with a dial), amperage is 24 so 15 x 24 is 360 watts. They don't mention watts, but we'll assume that is the max.
A 12a charge on a 7.4v pack would be 89 watts so your well within range. Even using the peak voltage of 8.4 comes to 100.8.
All good... unless you want to get into 20a+ charging
A 12a charge on a 7.4v pack would be 89 watts so your well within range. Even using the peak voltage of 8.4 comes to 100.8.
All good... unless you want to get into 20a+ charging
09-03-2013, 08:25 PM
#457
Tech Apprentice
iTrader: (3)
Your power supplies voltage is 11v to 15v (probably adjustable with a dial), amperage is 24 so 15 x 24 is 360 watts. They don't mention watts, but we'll assume that is the max.
A 12a charge on a 7.4v pack would be 89 watts so your well within range. Even using the peak voltage of 8.4 comes to 100.8.
All good... unless you want to get into 20a+ charging
A 12a charge on a 7.4v pack would be 89 watts so your well within range. Even using the peak voltage of 8.4 comes to 100.8.
All good... unless you want to get into 20a+ charging
Down at the local club in Melbourne we are a little bit more conservative, those charging at 10A or above are known as rebels and outlaws. The most I've seen anyone charging at is 16A which is still nowhere near the crazy talk I've been reading on this thread
09-04-2013, 11:57 PM
#461
What power supply is everyone here using with their icharger? ...the people NOT charging at 40A?!
I love this power supply.
http://www.google.com/search?q=alinc...&client=safari
Its only rated for 32 amps but I'm not sure you need to charge TWO batteries at 20 amps anyway since it takes like 45sec to juice a pack at that rate.
They use these for HAM Radios and for those that remember, KO USA sold these for a bit. I've seen these last over 10 years, probably longer than rctech has existed.
I love this power supply.
http://www.google.com/search?q=alinc...&client=safari
Its only rated for 32 amps but I'm not sure you need to charge TWO batteries at 20 amps anyway since it takes like 45sec to juice a pack at that rate.
They use these for HAM Radios and for those that remember, KO USA sold these for a bit. I've seen these last over 10 years, probably longer than rctech has existed.
09-05-2013, 03:19 AM
#462
Here is a cheap server power supply: 12v 74A (on 110v AC) or 108A (on 220v). The fan is pretty loud, but you can't beat the price from Ebay. All it takes is a little work.
http://www.rcgroups.com/forums/showthread.php?t=1005309
http://www.rcgroups.com/forums/showthread.php?t=1005309
09-05-2013, 08:23 AM
#463
Tech Fanatic
iTrader: (27)
http://www.ebay.com/itm/RC-POWER-SUP...item460be98e1e
That's the one I'm using right now. The guy actually posts here on rctech, but I forget his username. I preferred to just pay to have one already done rather than doing a bad job myself.
That's the one I'm using right now. The guy actually posts here on rctech, but I forget his username. I preferred to just pay to have one already done rather than doing a bad job myself.
09-05-2013, 08:59 AM
#464
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Location: Outside doing things in places... Denver, CO
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It does seem funny, people would work so hard to get the best chargers, high charge rates, best batteries... and then ignore a cell imbalance that could significantly shorten the life of the battery (by over charging one of the cells constantly)
09-05-2013, 01:31 PM
#465