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Posted by a1esta on February 19, 2007, 8:14 pm
Most manufacturers will state that the life of batteries in terms of
the number of charging and discharging cycles. I remember reading from
somewhere that rechargeable batteries has a shelf life even when the
batteries are not used.
For e.g., when the batteries are not being used, they will still be
"dead" say after 24 months or so. I also heard that for infreqently
used rechargeable batteries, it is necessary to store them at a very
low temperature (about 10 deg. C) in order to to prolong the shelf
life.
I intend to buy a cordless screw driver mainly for use in driving
screws on cabinets, walls etc. And I will use it only about 3 to 4
times per year. And if the batteries really have shelf life, it would
not be econimcal. Would it be better to get the corded tool instead?
Thanks!
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Posted by a1esta on February 19, 2007, 8:33 pm
> Most manufacturers will state that the life of batteries in terms of
> the number of charging and discharging cycles. I remember reading from
> somewhere that rechargeable batteries has a shelf life even when the
> batteries are not used.
> For e.g., when the batteries are not being used, they will still be
> "dead" say after 24 months or so. I also heard that for infreqently
> used rechargeable batteries, it is necessary to store them at a very
> low temperature (about 10 deg. C) in order to to prolong the shelf
> life.
> I intend to buy a cordless screw driver mainly for use in driving
> screws on cabinets, walls etc. And I will use it only about 3 to 4
> times per year. And if the batteries really have shelf life, it would
> not be econimcal. Would it be better to get the corded tool instead?
> Thanks!
Just to clarify what I said:
For e.g., when the batteries are not being used, they will still be
> "dead" say after 24 months or so. I also heard that for infreqently
> used rechargeable batteries, it is necessary to store them at a very
> low temperature (about 10 deg. C) in order to to prolong the shelf
> life.
The "dead" means it cannot be recharge or revived again.
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Posted by Tony Hwang on February 19, 2007, 8:59 pm
a1esta wrote:
>
>>Most manufacturers will state that the life of batteries in terms of
>>the number of charging and discharging cycles. I remember reading from
>>somewhere that rechargeable batteries has a shelf life even when the
>>batteries are not used.
>>For e.g., when the batteries are not being used, they will still be
>>"dead" say after 24 months or so. I also heard that for infreqently
>>used rechargeable batteries, it is necessary to store them at a very
>>low temperature (about 10 deg. C) in order to to prolong the shelf
>>life.
>>I intend to buy a cordless screw driver mainly for use in driving
>>screws on cabinets, walls etc. And I will use it only about 3 to 4
>>times per year. And if the batteries really have shelf life, it would
>>not be econimcal. Would it be better to get the corded tool instead?
>>Thanks!
>
>
> Just to clarify what I said:
>
> For e.g., when the batteries are not being used, they will still be
>
>>"dead" say after 24 months or so. I also heard that for infreqently
>>used rechargeable batteries, it is necessary to store them at a very
>>low temperature (about 10 deg. C) in order to to prolong the shelf
>>life.
>
>
> The "dead" means it cannot be recharge or revived again.
>
Hi,
Self discharge is through the internal resistance. Warm temp. makes the
chemicals more active. There are many different kinds of rechargeables.
They have individual charge/discharge characteristics.
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Posted by Joseph Meehan on February 19, 2007, 9:33 pm
a1esta wrote:
> Most manufacturers will state that the life of batteries in terms of
> the number of charging and discharging cycles. I remember reading from
> somewhere that rechargeable batteries has a shelf life even when the
> batteries are not used.
> For e.g., when the batteries are not being used, they will still be
> "dead" say after 24 months or so. I also heard that for infreqently
> used rechargeable batteries, it is necessary to store them at a very
> low temperature (about 10 deg. C) in order to to prolong the shelf
> life.
> I intend to buy a cordless screw driver mainly for use in driving
> screws on cabinets, walls etc. And I will use it only about 3 to 4
> times per year. And if the batteries really have shelf life, it would
> not be econimcal. Would it be better to get the corded tool instead?
> Thanks!
Battery technology keeps changing. My experience tells me that current
batteries are good for maybe 3-8 years total time if treated well.
In your case I would suggest making a plan to recharge them on a
schedule maybe every two or three months. Letting them totally discharge is
not good.
--
Joseph Meehan
Dia 's Muire duit
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Posted by hallerb@aol.com on February 19, 2007, 9:57 pm
wrote:
> a1esta wrote:
> > Most manufacturers will state that the life of batteries in terms of
> > the number of charging and discharging cycles. I remember reading from
> > somewhere that =A0rechargeable batteries has a shelf life even when the
> > batteries are not used.
> > For e.g., when the batteries are not being used, they will still be
> > "dead" say after 24 months or so. I also heard that for infreqently
> > used rechargeable batteries, it is necessary to store them at a very
> > low temperature (about 10 deg. C) in order to to prolong the shelf
> > life.
> > I intend to buy a cordless screw driver mainly for use in driving
> > screws on cabinets, walls etc. And I will use it only about 3 to 4
> > times per year. And if the batteries really have shelf life, it would
> > not be econimcal. Would it be better to get the corded tool instead?
> > Thanks!
> =A0 =A0 Battery technology keeps changing. =A0My experience tells me that=
current
> batteries are good for maybe 3-8 years total time if treated well.
> =A0 =A0 In your case I would suggest making a plan to recharge them on a
> schedule maybe every two or three months. Letting them totally discharge =
is
> not good.
> --
> Joseph Meehan
> =A0Dia 's Muire duit- Hide quoted text -
> - Show quoted text -
I use almost all corded tools, having tired of batteries dying at the
worst possible time......
usually their capacity just gets less over time accelerating near end
of life, about 3 years for most battery packs today.
comanys should be required to make them accept standard cells for easy
replacement
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> the number of charging and discharging cycles. I remember reading from
> somewhere that rechargeable batteries has a shelf life even when the
> batteries are not used.
> For e.g., when the batteries are not being used, they will still be
> "dead" say after 24 months or so. I also heard that for infreqently
> used rechargeable batteries, it is necessary to store them at a very
> low temperature (about 10 deg. C) in order to to prolong the shelf
> life.
> I intend to buy a cordless screw driver mainly for use in driving
> screws on cabinets, walls etc. And I will use it only about 3 to 4
> times per year. And if the batteries really have shelf life, it would
> not be econimcal. Would it be better to get the corded tool instead?
> Thanks!