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Model Forum / Radio Controlled / Land Models / November 2006



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long term storage of nimh

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ian - 01 Nov 2006 00:18 GMT
store them charged or discharged?  someone said refrigerate.
Doc - 01 Nov 2006 00:45 GMT
> store them charged or discharged?  someone said refrigerate.

Room temp.

Trickle charge to peak capacity/voltage every 2 months or so.

If you let em' sit for too long and they lose their charge, they're never
going to hold a proper one again.

Doc
Dre - 01 Nov 2006 01:06 GMT
> store them charged or discharged?  someone said refrigerate.

I keep them discharged personally.  Dont refrigerate, but I keep them in a
cool dry place.

NiMH batteries have a bad shelf life compared to Nicads so if you store them
charged, it wont take long before they are flat anyway.

Another reason for this is when I charge my batts, I dont like to have them
discharging for too long because when I want to drive, I want to drive and
not wait hours for batt to discharge :)

Cheers Dre
ian - 01 Nov 2006 02:00 GMT
: > store them charged or discharged?  someone said refrigerate.
:
[quoted text clipped - 9 lines]
:
: Cheers Dre

someone just suggested leaving permanently connected to an intelligent
trickle charger.  i know my prodigy II when set to 5 amps will pump out
250mah after the charge finished indicator comes on.  at 1 amp it produces
50mah.  Kid left charger on at school over school holidays.  fire started
after a week.
Dre - 01 Nov 2006 02:38 GMT
> : > store them charged or discharged?  someone said refrigerate.
> :
[quoted text clipped - 19 lines]
> 50mah.  Kid left charger on at school over school holidays.  fire started
> after a week.

There is no way I leave any sort of charger on unattended, not to mention
permanently on!!!.  I dont even leave them on overnight when I'm at home!
(expect for AA size batts which take 12 hours anyway)

I charge all my stuff in the garage where it is the coldest and I still have
stick packs over 5 years old and cranking along nicely.

Cheers Dre
Richard - 01 Nov 2006 02:55 GMT
>   Kid left charger on at school over school holidays.  fire started
> after a week.

OMFG!!!

That's like putting a Lithium Polymer battery to charge on your bed and then
going out for a hour or two.
 
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