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« on: September 07, 2010, 10:21:02 AM »

drrajdeepbrar

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NiMh

how to store NiMh batteries when not to be used for a log time should they be discharged or fully charged. and what is the discharge rate of NiMh Huh?

n wat does 1C mean.


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« Reply #1 on: September 07, 2010, 11:21:32 AM »

anwar

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Re: NiMh

Waiting for the self-admitted NiMH addict's answer on this... Sushil bhai


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« Reply #2 on: September 07, 2010, 03:38:05 PM »

sushil_anand

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Re: NiMh

Quote from: drrajdeepbrar on September 07, 2010, 10:21:02 AM

how to store NiMh batteries when not to be used for a log time should they be discharged or fully charged. and what is the discharge rate of NiMh Huh?

n wat does 1C mean.

Makes no difference.Unless you have the newer Low Self Discharge cells, they will discharge by themselves pretty rapidly.

I am not too sure about your question re: "discharge rate". Do you mean the maximum discharge rate?

1C is equivalent to the rated capacity. For example,for a 2200mAH cell the 1C charge or discharge rate would be 2.2A.


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« Reply #3 on: September 07, 2010, 03:42:30 PM »

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Re: NiMh

Quote from: anwar on September 07, 2010, 11:21:32 AM

Waiting for the self-admitted NiMH addict's answer on this... Sushil bhai

Anwar. My favourite would have been NiCds if they were still being made in higher capacities. Seemed more robust and never took you by surprise. But the LSD types have made NiMh workable and cost effective.


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« Reply #4 on: September 07, 2010, 03:44:53 PM »

sundaram

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Re: NiMh

Dear Rajdeep,

Answers to your question are here

http://sky.prohosting.com/air2/guide3.htm


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« Reply #5 on: September 07, 2010, 06:24:12 PM »

anwar

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Re: NiMh

I read about (and have been following) the practice of C/10 charging when you bring an NiMH out of hibernation, regardless of what charge level it went into hibernation.

Not sure how much truth is there in the need for periodic reviving of NiMH cells during looooong term storage.


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« Reply #6 on: September 07, 2010, 07:25:59 PM »

xxkrishxx

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Re: NiMh

I bought a new Lipo n never used & charged..Should I charge n discharge it often?


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« Reply #7 on: September 07, 2010, 07:28:05 PM »

anwar

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Re: NiMh

Keep it at storage charge, no need to recycle.

http://www.rcindia.org/batteries-and-chargers/taking-care-of-lipos/


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« Reply #8 on: September 07, 2010, 07:58:32 PM »

xxkrishxx

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Re: NiMh

So anwar should i charge it for half charge first,because the pack is never touched,bought b4 a month..


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« Reply #9 on: September 07, 2010, 08:14:21 PM »

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Re: NiMh

All lipos are stored and shipped at storage charge (from resellers).

If you have any means of verifying it, you can do so (just for your peace of mind). You should not have to ! On a 3s lipo, the voltage across the pack should be around 11.1v to 11.7v (3 x 3.7v to 3 x 3.9v)


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« Reply #10 on: September 07, 2010, 09:39:42 PM »

xxkrishxx

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Re: NiMh

Thanks anwar.How long it can be stored under this storage charge?


« Last Edit: September 07, 2010, 09:47:10 PM by xxkrishxx »	Logged

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« Reply #11 on: September 07, 2010, 09:48:42 PM »

anwar

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Re: NiMh

Don't know the answer to that... I am pretty sure they can last an year or two.


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« Reply #12 on: September 07, 2010, 10:26:03 PM »

saurabhhsrivastavaa

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Re: NiMh

Store Lipos at 3.85v per cell. this is the best storage voltage identified for Lipos. most of the common 50Watt chargers like Turnigy Accucell6 or Hot Power or Imax B6, etc have a program (Storage mode) to charge/discharge the lipos to 3.85v each.

This has been the best proven way to store Lipos for longer periods. I personally had brand new Lipos over 1.5 years in storage mode. I had taken them out yesterday to check the performance. Worked absolutely like brand new.

Hope this helps.


« Last Edit: September 07, 2010, 10:54:16 PM by saurabhhsrivastavaa »	Logged

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« Reply #13 on: September 08, 2010, 08:14:14 AM »

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Re: NiMh

Thanks..I have a Turnigy max 80w charger..I'll check the volt of the lipo on this week end..


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