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Electric Stunt => Gettin all AMP'ed up! => Topic started by: Paul Taylor on November 13, 2013, 05:53:18 PM
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I have a few 3000mha 4s batteries. I now understand if I change the out put amps on my charger it will charge faster. (1.2 amps vs 3.0 amps). My charger will output as much as 7 amps. What is a good rule of thumb?
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If you want the packs to last, charge at 1C (1x the capacity of the pack), so in your case, 3.0 amps.
I've had packs that are 5 years old, have had over 500 cycles and only now are struggling to push out 80 amps.
they've always been charged at 1C, and ALWAYS have been put on a storage charge if left for more than a day.
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I charge mine at 3.0 amps, 1/10 of the mah rating of the battery
Fred
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I charge mine at 3.0 amps, 1/10 of the mah rating of the battery
Fred
only if your battery pack was 30000mah is 3 amps 1/10 of the capacity.
3000mah, = 3AH so 1C is 3 amps.
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In your case it probably wont matter but exactly which 4s 3000mah batteries do you have? Different brands can be charged at different rates. Maybe you can post a link to the exact battery? Most batteries these days can be charges at a minimum of 2c or 3c. I try to buy batteries that can be charged at 5c for myself then I charge them at 3-4c to take it easy on them. When I charge from storage mode I pretty much follow the same procedure as Bob does.
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Spec.
Capacity: 3000mAh
Voltage: 4S1P / 4 Cell / 14.8V
Discharge: 25C Constant / 50C Burst
Weight: 299g (including wire, plug & case)
Dimensions: 150x45x24mm
Balance Plug: JST-XH
Discharge Plug: 4mm bullet-connector Connector
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From the specs it looks like this one. http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=20442 . If so that battery is rated at a 5c charge. Even if you max your charger out you wouldn't even be hitting 50% of that batteries charging capability. So feel free to charge up to full speed with the charger that you have. That battery can be charged at 15 amps max.
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Thanks guys for all the feedback. Im learning a bunch of new stuff. #^
And three more electric flights before the sun set this afternoon. ;D
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In my experience with nano-techs, while you can charge them at 5C, they lose their punch fast.
AS a matter of fact, it seems like anything you do to those packs, they loose their punch. Even leaving them sitting charged seems to have an effect.
I've been running a 3000 4s in one of my 3D planes, and while it only got charged at a max of 2C, it's weaker than a 2200 4s now.
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Thanks guys H^^
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Bob, yeah they are. A friend of mine works for a company manufacturing UAVS, and during testing they tried just about every pack that was available at the time. After countless cycles the Hyperion G3 was the chosen one.