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Author Topic: RC battery charged two weeks ago  (Read 4138 times)

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Offline Scuba Jeremy

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RC battery charged two weeks ago
« on: February 22, 2004, 12:29:55 PM »
I was going to tape a show two weeks ago, but the show was cancelled. I charged both of my 9.6v RC batteries, and all they've been doing is sitting in my bag for a couple weeks. Will they be okay to power my UA5 for a 3 hour show on Tuesday night, or should I drain and recharge them?

How long will a charged RC battery go without being used before it starts to wear down?
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Offline mirth

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Re:RC battery charged two weeks ago
« Reply #1 on: February 22, 2004, 03:49:35 PM »
I think the disconnected discharge rate for NiMH batts is roughly 1%/day. I seem to recall seeing that here a few months ago
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Offline dklein

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Re:RC battery charged two weeks ago
« Reply #2 on: February 22, 2004, 08:15:13 PM »
top 'em up - no need to discharge.  They're probably only at about 70%capacity now.  Self - discharge on NiMh is ~1% /day.
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Offline Scuba Jeremy

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Re:RC battery charged two weeks ago
« Reply #3 on: February 23, 2004, 12:23:59 AM »
If I were to plug in the RC battery tonight, it wouldn't start a full recharge cycle, you're saying it would just top off the battery? I don't want to charge an already-charged battery, I'm afraid that would damage the cells, but if it will just top it off, that would work.
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Offline mirth

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Re:RC battery charged two weeks ago
« Reply #4 on: February 23, 2004, 12:36:33 AM »
If you're talking about the 200mAh charger that came with the battery (assuming this is one from batteryspace) then you'd have to leave it on the charger for a long time to damage it...
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Offline Scuba Jeremy

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Re:RC battery charged two weeks ago
« Reply #5 on: February 23, 2004, 12:39:49 PM »
Nope, Rat Shack 1600 9.6v RC batteries.
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Offline mirth

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Re:RC battery charged two weeks ago
« Reply #6 on: February 23, 2004, 01:02:56 PM »
Well in that case yer on your own. The self discharge rate still applies if they're NiMH cells.
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Offline F.O.Bean

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Re:RC battery charged two weeks ago
« Reply #7 on: February 23, 2004, 02:34:01 PM »
so is it alright to top off a 1000mah ni-cd batt from rat shack???
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Offline mirth

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Re:RC battery charged two weeks ago
« Reply #8 on: February 23, 2004, 03:01:08 PM »
If its a Ni-Cad battery then I think it would be in your best interest to drain & fully charge to avoid the dreaded memory effect.
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Offline F.O.Bean

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Re:RC battery charged two weeks ago
« Reply #9 on: February 23, 2004, 03:15:18 PM »
Quote from: mirth on February 23, 2004, 03:01:08 PM
If its a Ni-Cad battery then I think it would be in your best interest to drain & fully charge to avoid the dreaded memory effect.

thanks mirth ;)

hey skalinder, what do you w/ your 9.6v's ???

how does one fully discharge???
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Offline Brian Skalinder

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Re:RC battery charged two weeks ago
« Reply #10 on: February 23, 2004, 03:18:26 PM »
Quote from: bean on February 23, 2004, 03:15:18 PM
hey skalinder, what do you w/ your 9.6v's ???

Nothin'.  Just top 'em up.  But I run NiMH not NiCD.

Quote from: bean on February 23, 2004, 03:15:18 PM
how does one fully discharge???

Theoretically, I don't need to as I'm running NiMH.  Just run your ODL-312 for 20 hrs and it'll discharge that sucker.  Or, you could hook up a device which draws more juice if you want to drain it faster.
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Offline F.O.Bean

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Re:RC battery charged two weeks ago
« Reply #11 on: February 23, 2004, 03:26:38 PM »
Quote from: Brian Skalinder on February 23, 2004, 03:18:26 PM
Quote from: bean on February 23, 2004, 03:15:18 PM
hey skalinder, what do you w/ your 9.6v's ???

Nothin'.  Just top 'em up.  But I run NiMH not NiCD.

Quote from: bean on February 23, 2004, 03:15:18 PM
how does one fully discharge???

Theoretically, I don't need to as I'm running NiMH.  Just run your ODL-312 for 20 hrs and it'll discharge that sucker.  Or, you could hook up a device which draws more juice if you want to drain it faster.

i just posted in my dol thread, but i got 18.5 hrs so far on a 1000mah!!!

i thought you had ni-cd, hmmmmm, i might look into those then :)

rat shack has em i take it
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Offline caymanreview

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Re:RC battery charged two weeks ago
« Reply #12 on: February 23, 2004, 03:34:10 PM »
yes rat shack does... cheaper online at batteryspace.com

17.99 for just the 3000mah 9.6v pack
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Offline F.O.Bean

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Re:RC battery charged two weeks ago
« Reply #13 on: February 24, 2004, 08:41:24 AM »
Quote from: caymanreview on February 23, 2004, 03:34:10 PM
yes rat shack does... cheaper online at batteryspace.com

17.99 for just the 3000mah 9.6v pack

damn, tahts pretty good, only thing is, my charger only goes up to 1500 or 1600 mah, and i could NEVER keep track of batt life w/ that many mah's!!! ;D
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Re:RC battery charged two weeks ago
« Reply #14 on: March 08, 2004, 06:44:31 PM »
OK, I'm going deep into my memory cells on this one:

1) NiCds have memory, NiMH generally does not.
2) There is a charger that is claimed to pulse power into NiCds in a VERY specific pattern relative to %-charged value that eliminates the concern over NiCd memory.
3) I do not know if the smart charger from battery space has this feature.

If anyone has any solid info. on this please PM me or post it.
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