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HelicopterMain Discussion › Store batteries: charged or discharged ?
10-21-2004 04:15 AM  13 years agoPost 1
RRuiz

rrApprentice

Puebla, Mexico

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I don't have a lot of opportunities to fly, so I try 2 or 3 times per month.
I am curious to know if I have to discharge them after I flew.... beside this question when is convenient to discharge the battery before a full charge?
Thanks

Roberto

Don't let confidence exceed ability

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10-21-2004 04:32 AM  13 years agoPost 2
Mike Wilson

rrVeteran

Toronto, Canada

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Roberto,

If you are using Nicad batteries or NIMH batteries, you do not have to discharge them for storage. Nicad batteries need to be conditioned every few months by doing a few full discharge/charge cycles to keep the cells working well. NIMH batteries do not suffer from the same memory effect that Nicads have so it is not as critical to cycle these batteries. If you are using or plan to use Li Po batteries, you must never fully discharge these batteries as this could damage the cells and lead to a fire.

....led

Teambob00

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10-21-2004 11:39 AM  13 years agoPost 3
frebou

rrKey Veteran

Montreal / Canada

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Schulze in their charger manual says to store them empty. Batteries tends to loose charge while being stored. The problem is that they do not discharge at the same rate so you end up with an unbalanced pack that will give you false peak on the next charge.

I think Schulze is a very credible source in term of batteries and I've been doing as they said from then and never had a problem.

Check their isl -?30 pdf manual to confirm my says.

/fb

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10-21-2004 11:58 AM  13 years agoPost 4
Lock-Tite

rrVeteran

Quebec, Canada

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I store Nicd discharged at 0.9v per cell.
I store Nimh charged at 80%

Frank
Dont forget to bring a clean pair of shorts when flying 3D ;)

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10-21-2004 01:52 PM  13 years agoPost 5
SteveH

rrProfessor

Texas

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I store NiMh and NiCd batteries charged and on a trickle charger. That way they are always charged and ready to go when I get a chance to go fly.

I know some will say this is a bad idea, but I've been doing it for 19 years and I've thrown away NiCd batteries that were 5 years old and still checked good....just didn't want to take the chance after they were that old. Now, who's going to argue with my sucess?

The government cannot give you anything without first taking it from someone else.

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10-21-2004 02:55 PM  13 years agoPost 6
Gary

rrVeteran

Crosby, Texas

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I've quit running NiCd in anything. The newer cells out now make it much easier and way less maintainence. I've started running Duralites in everything and I just feel they are the best way to go. They are definitely more expensive but in the long run I believe they are well worth it.

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10-21-2004 04:30 PM  13 years agoPost 7
JKos

rrProfessor

Redondo Beach, CA

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Here is an excellent web site for everything you want to know about NiCd and NiMh batteries. This man knows what he is talking about. http://www.rcbatteryclinic.com/

For those who don't want to read the great site, here is the bottom line...
Discharge to 1.1 V per cell and store them in the refrigerator.

He tells why on the web site.

- John

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10-21-2004 06:05 PM  13 years agoPost 8
w.pasman

rrElite Veteran

Netherlands

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I double led's advice. But additionally I would empty NiCd's after every flying day instead of every month or so.

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10-23-2004 03:22 AM  13 years agoPost 9
RRuiz

rrApprentice

Puebla, Mexico

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Good link of JKos!!
All >> review this site!
Thanks

Roberto

Don't let confidence exceed ability

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10-23-2004 05:35 AM  13 years agoPost 10
Mike Wilson

rrVeteran

Toronto, Canada

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Thanks for the link JKos,

There is some good information on that site. As far as dicharging is concerned for storage, he actually says that it is not cirtical to discharge but you can discharge to 1.1 v per cell for nicads and then put them in the refrigerator.

....led

Teambob00

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10-23-2004 07:08 AM  13 years agoPost 11
Boom_Strike

rrNovice

Littleton, CO

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I dead short Nicads and store NiMH at about 50%.

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