Today's Message Index:
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1. 12:08 AM - Re: Rejuvenating Ni-MH battery (John MacCallum)
2. 08:30 AM - Re: Rejuvenating Ni-MH battery (Robert L. Nuckolls, III)
3. 01:07 PM - Re: Rejuvenating Ni-MH battery (Bill)
Message 1
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| Subject: | Rejuvenating Ni-MH battery |
There are battery rejuvenating chargers around but I have had little success
with them in commercial use.
I just go out and buy a new battery when they start to play up.
Cheers
John MacCallum
VH-DUU
RV 10 # 41016
-----Original Message-----
From: owner-aeroelectric-list-server@matronics.com
[mailto:owner-aeroelectric-list-server@matronics.com] On Behalf Of Charles
Brame
Sent: Thursday, 6 December 2012 3:31 PM
Subject: AeroElectric-List: Rejuvenating Ni-MH battery
--> <chasb@satx.rr.com>
Bob, et. al.,
I recall this was a thread awhile back, but I could not find my answer in
the archives.
Basically I have a 9.6v, 760mAh, Ni-MH battery pack (BP-200L) for an ICOM
handheld radio. The battery will no longer take a charge. Is there any way
to rejuvenate the battery? I emailed the question to the ICOM Technical
Service department, but they never bothered to respond.
One of the AeroElectric archive suggestions was to discharge a Ni-MH battery
with a dead short for 24 hours, then apply a 1 amp, 3v charge for a few
seconds, then recharge normally. However, I think this recommendation must
have been for a smaller battery, maybe a 1.5v cell. Is there a recommended
flash voltage and amperage to try and rejuvenate my 9.6v battery?
Charlie Brame
RV-6A N11CB
San Antonio
Message 2
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| Subject: | Re: Rejuvenating Ni-MH battery |
At 10:30 PM 12/5/2012, you wrote:
>
>Bob, et. al.,
>
>I recall this was a thread awhile back, but I could not find my answer
>in the archives.
>
>Basically I have a 9.6v, 760mAh, Ni-MH battery pack (BP-200L) for an
>ICOM handheld radio. The battery will no longer take a charge. Is
>there any way to rejuvenate the battery? I emailed the question to the
>ICOM Technical Service department, but they never bothered to respond.
Have you looked to see what's involved in getting
the battery box open? There are companies that
specialize in cell replacement for a constellation
of products.
I've kept an inventory of AAA, AA and 2/3C NiMh cells
with solder tabs on hand to re-cell many of my own
tools. Just replaced all the cells in my wireless
phone handsets for a fraction of the cost of manufactured
cell assemblies.
As others have noted, rejuvenating the stagnant
cad cell is problematic. You $time$ fiddling with
a junk cell can easily cost you more than a new cell.
The last time I used rechargeable cells in my
camera equipment, I used a magic marker to denote
the number of recharge cycles on each cell in my
inventory. I pitched the cells after a dozen or so
cycles. An imbalance of cell capacity sets up
a scenario where one soggy cell in an array of four can
cause a device to quit in spite of the fact that
the other cells are in great shape. The $time$ it
takes to cap-check cells and mate them with cells
of similar capacity was simply not a good use
of $time$. I could buy an AA NiMh battery for
about the same cost as a premium AA alkaline.
Ten cycles through the charger reduces my
battery costs by 90% while scheduled 'retirement'
maintained overall system reliability without
incurring preventative maintenance expenses.
Bob . . .
Message 3
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| Subject: | Re: Rejuvenating Ni-MH battery |
Charlie -
I have the same BP-200L battery with my iCom A23. Like you I tried to
cajole it back to life using the supplied charger but failed.
I bought a replacement battery "ProStar PSI-BP200JH", from "atbatt.com"
for $43.08 delivered to my door. Got it a couple of months ago and it -
seems fine so far. Keeps a charge while attached to radio for about a
month. My worn-out original batt wouldn't hold a charge (what charge?) for
more than a day switched "off". Can't vouch for this replacement battery
long-term but so far so good.
Bill
On Wed, Dec 5, 2012 at 8:30 PM, Charles Brame <chasb@satx.rr.com> wrote:
>
> Bob, et. al.,
>
> I recall this was a thread awhile back, but I could not find my answer in
> the archives.
>
> Basically I have a 9.6v, 760mAh, Ni-MH battery pack (BP-200L) for an ICOM
> handheld radio. The battery will no longer take a charge. Is there any way
> to rejuvenate the battery? I emailed the question to the ICOM Technical
> Service department, but they never bothered to respond.
>
> One of the AeroElectric archive suggestions was to discharge a Ni-MH
> battery with a dead short for 24 hours, then apply a 1 amp, 3v charge for a
> few seconds, then recharge normally. However, I think this recommendation
> must have been for a smaller battery, maybe a 1.5v cell. Is there a
> recommended flash voltage and amperage to try and rejuvenate my 9.6v
> battery?
>
> Charlie Brame
> RV-6A N11CB
> San Antonio
>
>
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