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Old Jan 21, 2013, 08:35 AM
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Noob question .. Nano-tech lipo charging

Hi Im a noob here so please go gental on me . Iv bought 4x 600mAh 1S 35-70c nano-tech li-po to use on a small quad, Now my question is can i charge these at a higher rate than 600mAh ie 800mAh or 1000 Mah on my charger , Any help would be nice, thanks in advance
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Old Jan 21, 2013, 09:16 AM
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i wouldnt go any higher then 1amp
also you can charge them in parallel if you have a bunch of them
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Old Jan 21, 2013, 10:53 AM
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i wouldnt go any higher then 1amp
also you can charge them in parallel if you have a bunch of them

Thanks
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Old Jan 21, 2013, 11:32 AM
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I would have no reservation whatsoever charging them at up to 3 amps (5C). Most of the Nanotechs are rated for 10C charge and some even 15C.
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Old Jan 21, 2013, 12:53 PM
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i usually charge lipos at half their capacity, i use 2200 mah nanotech, as i noticed that they give more power and last longer then when i charge them with more current, they are rated for 10c but i would never try that, that is my opinion, max current i use is full capacity of battery in your case that would be 600 mAh
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Old Jan 21, 2013, 02:23 PM
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I agree with mrforsyth.
BTW what charger are you using.

Glen
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Old Jan 21, 2013, 05:20 PM
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I agree with mrforsyth.
BTW what charger are you using.

Glen
Iv got a cheap Imax B6, Iv made a little parallel charger cable 3 female JST to a Tamiya Connector ,
I know im being a bit cheeky but.... whats the best way to charge my cells, Would i do Li-po 3 cell, @ 600mAh or Li-po 3 cell @1800mAh????
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Old Jan 21, 2013, 05:36 PM
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Iv got a cheap Imax B6, Iv made a little parallel charger cable 3 female JST to a Tamiya Connector ,
I know im being a bit cheeky but.... whats the best way to charge my cells, Would i do Li-po 3 cell, @ 600mAh or Li-po 3 cell @1800mAh????
If you made a parallel cable your charge is LiPo 1S at 1.8 amps, a 1C charge.

But I would go up to at least 3.6 amps, a 2C charge.

Your charger would support 5 amps but I wouldn't go there as I don't like pushing any charger to it's limit. The batteries certainly could take it though.

Glen
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Old Jan 21, 2013, 06:27 PM
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Thanks Glen

Here is a little picture of my attempt
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Old Jan 21, 2013, 07:22 PM
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Nicely done on the adapter.

Since your adapter connects the cells in parallel, simply add capacity and charge as a single 1S pack. For 1C rate, charge at 1800mA. For 2C, 3600mA, etc...

Mark
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Old Jan 21, 2013, 11:26 PM
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Originally Posted by romano_st View Post
i usually charge lipos at half their capacity, i use 2200 mah nanotech, as i noticed that they give more power and last longer then when i charge them with more current, they are rated for 10c but i would never try that, that is my opinion, max current i use is full capacity of battery in your case that would be 600 mAh
So you charge a 2200mah pack a 1.1A?

Waste of time, no pack has any issues with 1C (heck the 18650 cells i use in torches have no issues with 1C) and any decent one will be fine with 2C no troubles.

Minimum 1C, maximum whatever the pack states, maybe a bit less than that if it is a cheap pack (I dont think I would charge nano-techs at 10C, but would have no problems with 5C).
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Old Jan 23, 2013, 11:30 AM
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So you charge a 2200mah pack a 1.1A?

Waste of time, no pack has any issues with 1C (heck the 18650 cells i use in torches have no issues with 1C) and any decent one will be fine with 2C no troubles.

Minimum 1C, maximum whatever the pack states, maybe a bit less than that if it is a cheap pack (I dont think I would charge nano-techs at 10C, but would have no problems with 5C).
desertstaker, like i said that is what i observed, slower i charge them they last more, since i can fly my funcub approx 5 min on 2200 nanotech ,additional minute or so matter to me. Of course that charging them with 1c or more wont harm them, for example once i was in rush and charged them with 5 amps what is maximum on my charger flight time was around 4 minutes per battery (mixed throttle) , maybe i am wrong but for me they last longer if i charge them with 1/2c

best regards
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Old Jan 23, 2013, 02:36 PM
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Low charge rates are good once in a while for a good balance charge,it gets the cells very close in voltage,otherwise i'm not bother'd.
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Old Jan 23, 2013, 04:33 PM
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slower i charge them they last more, since i can fly my funcub approx 5 min on 2200 nanotech ,additional minute or so matter to me.
Longer flights ≠ last longer.

The reason that a lower charge rate results in a longer flight is that you achieve a more complete charge. More complete charge has been empirically demonstrated to result in fewer usable cycles than charging to a lower termination voltage. As such, lower charge rate can result in lower battery life (# of useful cycles).

Mark
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Old Jan 24, 2013, 04:35 PM
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Just a Little up date to my home made Charger cable gone form a 3 way to a 6 way, charged at 2C took 42mins to charge 3 cells @ 3600mAh,

Thanks for all your help guys,

Just a thought but is there a way to balance charge all 3 cells, I know you don't need to balance charge a single cell but for when iv got 3 or more connected?????
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