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Posted by MiamiCuse on October 23, 2009, 10:07 pm
I have a cordless drill using NiCad bateries. They died a few weeks ago and
last week I got two new batteries.
I fully charged one, used it and waited till it was fully drained, and
started charging again...STUPID ME, I forgotten about it and left it in the
charger for a full week and didn't realized it until today!!!
I heard that if you left your battery in the charger after it has been fully
charged it will create the memory effect again, is this right? Did I ruin
this new battery by my dumbness again?
One other related question, my cell phone uses a lithium ion battery. I
have a car charger and a regular charger. My friend told me I should avoid
charging with the car charger as much as possible because they create memory
effect on the battery. Is this true? I could not find any online
references for this.
Thanks in advance,
MC
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Posted by JIMMIE on October 23, 2009, 10:13 pm
> I have a cordless drill using NiCad bateries. =A0They died a few weeks ag=
o and
> last week I got two new batteries.
> I fully charged one, used it and waited till it was fully drained, and
> started charging again...STUPID ME, I forgotten about it and left it in t=
he
> charger for a full week and didn't realized it until today!!!
> I heard that if you left your battery in the charger after it has been fu=
lly
> charged it will create the memory effect again, is this right? =A0Did I r=
uin
> this new battery by my dumbness again?
> One other related question, my cell phone uses a lithium ion battery. =A0=
I
> have a car charger and a regular charger. =A0My friend told me I should a=
void
> charging with the car charger as much as possible because they create mem=
ory
> effect on the battery. =A0Is this true? =A0I could not find any online
> references for this.
> Thanks in advance,
> MC
Neither case has ever happened to me. I leave the batteries for my
drill in the charger continuously until the next time I need it. Never
had a problem but I must admit after 4 years they dont hold up quite
as good as they used to. Is this memory?
Jimmie
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Posted by Stormin Mormon on October 24, 2009, 9:40 am
That's something called "expected lifespan".
--
Christopher A. Young
Learn more about Jesus
www.lds.org
.
news:7bed4cc2-dc92-476f-a189-
after 4 years they dont hold up quite
as good as they used to. Is this memory?
Jimmie
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Posted by ransley on October 23, 2009, 10:15 pm
> I have a cordless drill using NiCad bateries. =A0They died a few weeks ag=
o and
> last week I got two new batteries.
> I fully charged one, used it and waited till it was fully drained, and
> started charging again...STUPID ME, I forgotten about it and left it in t=
he
> charger for a full week and didn't realized it until today!!!
> I heard that if you left your battery in the charger after it has been fu=
lly
> charged it will create the memory effect again, is this right? =A0Did I r=
uin
> this new battery by my dumbness again?
> One other related question, my cell phone uses a lithium ion battery. =A0=
I
> have a car charger and a regular charger. =A0My friend told me I should a=
void
> charging with the car charger as much as possible because they create mem=
ory
> effect on the battery. =A0Is this true? =A0I could not find any online
> references for this.
> Thanks in advance,
> MC
You say you fully discharged it, well that can kill Nicads by causing
cells to reverse polarity, you left it in a charger a week, most new
chargers stop charging when the cell peaks. Was the battery real warm,
if not I would not worry about the charger continuing to burn it up
but a nicad is fully discharged when the drill just slows down, drain
them dead will shorten its life, so will overcharging.
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Posted by Angello Huong on October 24, 2009, 8:53 am
On Fri, 23 Oct 2009 22:07:29 -0400, "MiamiCuse"
>I have a cordless drill using NiCad bateries. They died a few weeks ago and
>last week I got two new batteries.
>I fully charged one, used it and waited till it was fully drained, and
>started charging again...STUPID ME, I forgotten about it and left it in the
>charger for a full week and didn't realized it until today!!!
>I heard that if you left your battery in the charger after it has been fully
>charged it will create the memory effect again, is this right? Did I ruin
>this new battery by my dumbness again?
>One other related question, my cell phone uses a lithium ion battery. I
>have a car charger and a regular charger. My friend told me I should avoid
>charging with the car charger as much as possible because they create memory
>effect on the battery. Is this true? I could not find any online
>references for this.
>Thanks in advance,
>MC
Fully discharging the battery probably drastically reduced the
number of recharge cycles that you can get out of it--in the long run.
About the leaving the battery on the charger question: It depends
on whether the charge is voltage regulated or not. Some chargers
switch to trickle charge after a certain voltage level is hit. The
cheaper ones usually don't and they keep loading up the battery with
electricity that the battery can't take in after its been fully
recharged. That will kill a battery life as well--either by
shortening the battery liftspan due to the excess energy being
converted into heat or maybe altering the chemical balance of the
battery acid & fluids.
Check the power output specs on the back of the AC box. It should
list output voltage and the amps that is generates. The voltage
output should only be about 5-10% or so more than the battery rating
(i.e. 12.6-13.2V output for a 12V battery). And the amperage should
only be 1/30th of the battery's capacity (i.e. 0.1 amps output for a 3
amp battery). That's the level for a safe trickle charge.
Just a general rough estimate based on my experiences in owning a
couple dozen different rechargeable gadgets over the years.
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