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Old 11-25-2006, 12:45 AM   #1
Jam
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Default Step Charging

I would love to learn more about step charging, if its better than standard charging, if it kill your batteries, what is the general rule on each of the steps when step charging.
Are there any articles about that that one could take a look at?
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Old 11-25-2006, 08:05 AM   #2
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I could be wrong, but I believe it gives a longer run time(like pulse charging). Someone will correct me if I'm mistaken with this one. I don't think it kills batteries though.

Charging at high amps gives you more punch and kills your batteries. Slow charging gives more run time, but your batteries last longer. These methods apply to runtime and life of the batteries.
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Old 11-25-2006, 08:58 AM   #3
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The latest RC Car Action actually has an article on it if you want to read about it.

One benefit of step charging is you can keep the batteries much cooler - but it takes so much longer to charge (depending on the steps you use) that it isn't real pratical in normal club racing where your rounds are back to back.

For example you can have one step charge @ 4amps until 2000-2500 mAh, then have the battery "rest" at .2-3 amp until it reaches 2600, then finish it off at 6amps until peaked. The battery will still be warm and ready to go when it peaks and have the punch you want, but it was much easier on the pack to get to the final charge. But charging like that can take an hour or longer.
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Old 11-25-2006, 06:31 PM   #4
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With my experience through step charging, charge times have only increased by a few minutes. (Charging 3300s and 3800s only) Using the Much More CTX-C, The first step is a high amp charge, 7A, then it drops to .2 and back up to 6A to finish the charge. When its charging at .2A, it allows the battery to rest, before it charges at a lower amperage to finish peaking the pack. Batteries take more capacity, and stay consistent through the entire run.

Also if your a person that dead-shorts packs, the CTX-C has a lockout function, where it doesn't allow it peak the pack within the first 2 steps. Effectively reducing false peaking.
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Old 11-26-2006, 07:15 AM   #5
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Tek.....i didn't know 3800's can withstand dead-shorting. i heard you should dead-short ANY of the IB's.
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Old 11-26-2006, 09:49 AM   #6
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Ok, great that make a more sense now, but how should I be splitting the charge up. In other words if Iím charging a 2400 nicd
1st step = 40% of battery @ 5.5a
2nd step = 15% of battery @ 3a
3rd step = 20% of battery @ 4a
4th step = 25% of battery @ 5.5a (should I add 10% of battery on the last step ie 2400 last step to 2700)
Should I even be doing four steps or only 3?
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Old 11-26-2006, 01:55 PM   #7
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I spent a lot of playing with step charging... I couldnt find any benifit with step charging for racing. As far as the cells are cooler.... well for racing... I find I want my packs over 120 before they hit the track. Now this is for racing only... for bashing or for guys who want to run their cells for a year I agree cooler is better.
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Old 11-26-2006, 05:23 PM   #8
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GOOD ? we have played with it but the ib 4200 cell like to be abought 125 to 130 to really rip the step charge we have seen no improvement out of the cells
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