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Batteries & Chargers Discuss Li-P, Li-Ion, NiMh, Nicad battery technology and the chargers that juice 'em up!

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Old 09-23-2014, 02:58 AM   #1
jeff4912
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Default How to cycle new nimh battery....?

I have a new 2000mah 4.8v Nimh receiver battery for one of planes and want to know how to break it in on my icharger 206B.
What charge settings do I use? 0.2amps?
Does the charger know the voltage because of the cell count, in this case it's 4 AA cells, so 4S?
Do I use the "forming" menu to break the battery in?
Will 3 cycles get the job done?
A lot of questions I know...sorry, but I want to learn this correctly.

Thank you.

Jeff
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Old 09-23-2014, 03:40 AM   #2
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Lots of answers....

NiMH / NiCAD FAQ Battery Support Questions & Answers

fly
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Old 09-23-2014, 04:35 AM   #3
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Originally Posted by jeff4912 View Post
I have a new 2000mah 4.8v Nimh receiver battery for one of planes and want to know how to break it in on my icharger 206B.
What charge settings do I use? 0.2amps?
Does the charger know the voltage because of the cell count, in this case it's 4 AA cells, so 4S?
Do I use the "forming" menu to break the battery in?
Will 3 cycles get the job done?
A lot of questions I know...sorry, but I want to learn this correctly.

Thank you.

Jeff
H'mmm
How big of a model are you flying? IMHO, those 4 cell "AA" style Nih batteries can be a bit marginal for larger model airplanes. Especially when running with a 2.4 Ghz radio system.

If you're flying Electric with a 3 - 6 cell LiP pack or similar, consider the Castle Creations 10 Amp uBEC (Switching Battery Elimination Circuit) These units are actually less expensive than a 4 cell Nih battery pack, and will far outperform the Nih packs at high currents. And, charging a receiver battery is not an issue, since you don't have one. If you overrun your LiPo battery pack down to far with the electric motor up front, you will still have plenty of receiver power to safely land your model.
http://www.castlecreations.com/products/ccbec.html

These uBEC's are quite easy to install, just connect its two DC input wires to the Electronic Speed Control input wires, and plug in the uBEC's output connector to the receiver's battery input.

I've got 8 of those CC uBEC's and all have been flawless over some 5 years. On my two giant scale electric models, I also have a two cell A123 battery pack for backup power, but that is another topic.

Also, those same A123 cells are a drop in replacement for a 5 cell Nih pack, about the same weight, and far more capable of high currents for the larger models servos.
http://hangtimes.com/a123_batteries_for_giants_faq.html

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Old 09-23-2014, 07:53 AM   #4
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Originally Posted by jeff4912 View Post
I have a new 2000mah 4.8v Nimh receiver battery for one of planes and want to know how to break it in on my icharger 206B.
Basically all you do is charge it up and use. First 2 or 3 charge cycles will improve slightly, but it really is only a charge and use scenario.

What charge settings do I use? 0.2amps?
For initial charging I would use anywhere from 50 - 200 mA ... this will slow charge and make sure all cells get similar level charged. At 200 mA you would charge for at least 14 hours.

Does the charger know the voltage because of the cell count, in this case it's 4 AA cells, so 4S?
Set your charger to NiMH and do not worry about number of cells, the charger will set that itself. Never think of NiMH as any S number.

Do I use the "forming" menu to break the battery in?
Personally I don't believe in forming - its a marketing ploy. If the cells are absolutely new of production line, then yes, but most over counter have been factory tested.

Will 3 cycles get the job done?
Thats 3 cycles of life wasted in my opinion.

A lot of questions I know...sorry, but I want to learn this correctly.

Thank you.

Jeff
No problem .... its what forums are for.

Note my view on NiMH are possibly in conflict with others, but in over 45yrs of using NiXX cells for general and high demand applications, I stand by my views ....



My advise .... charge in NiMH setting at max 0.2A (200 mA) for usual charging, but at max 1A when fast charge needed. Always use the chargers built in program if charging at high rates.

For general charging - I use the wall charger supplied with radios. At 50mA I can leave indefinitely and be sure of full charge pack.

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Old 09-23-2014, 08:21 PM   #5
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Thank you for taking the time to thoroughly answer my questions, much appreciated.

Jeff
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