v60i battery

Further, V60 batteries are Lithium Ion and do not suffer from memory.
They do suffer from being run all the way down if my friend, the electrical
engineer, can be believed.


--
Thomas M. Goethe

"Steve Knight" <[email protected]> wrote in message
news:[email protected]...
> On Wed, 15 Oct 2003 22:27:33 -0000, [email protected] (G G)
wrote:
>
> >Ya it can never hurt to let the battery drain completely then charge up
> >fully, repeat
>
> From GE Tech Notes ....
>
> "Among the many users of batteries in both the industrial and consumer
> sectors, the idea of a memory phenomenon in nickel-cadmium batteries has
been
> widely misused and understood. The term 'memory' has become a catch-all
> 'buzzword' that is used to describe a raft of application problems, being
most
> often confused with simple voltage depression.
>
> "To the well informed, however, 'memory' is a term applied to a
specific
> phenomenon encountered very infrequently in field applications.
Specifically,
> the term 'memory' came from an aerospace nickel-cadmium application in
which the
> cells were repeatedly discharged to 25% of available capacity (plus or
minus 1%)
> by exacting computer control, then recharged to 100% capacity WITHOUT
OVERCHARGE
> [emphasis in the original]. This long term, repetitive cycle regime, with
no
> provisions for overcharge, resulted in a loss of capacity beyond the 25%
> discharge point. Hence the birth of a "memory" phenomenon, whereby
> nickel-cadmium batteries purportedly lose capacity if repeatedly
discharged to a
> specific level of capacity.
>
> "The 'memory' phenomenon observed in this original aerospace
application was
> eliminated by simply reprogramming the computer to allow for overcharging.
[Note
> that no mention is made of adding an intentional *discharge* to clear the
> problem - RLM] In fact, 'memory' is always a completely reversible
condition;
> even in those rare cases where 'memory' cannot be avoided, it can easily
be
> erased. Unfortunately, the idea of memory-related loss of capacity has
been with
> us since. Realistically, however, ' memory' cannot exist if any one of the
> following conditions holds:
>
> 1. Batteries achieve full overcharge.
> 2. Discharge is not exactly the same each cycle - plus or minus
2-3%
> 3. Discharge is to less than 1.0 volt per cell.
>
> "Remember, the existence of any ONE of these conditions eliminates the
> possibility of 'memory'. GE has not verified true 'memory' in any field
> application with the single exception of the satellite application noted
above.
> Lack of empirical evidence notwithstanding, 'memory' is still blamed
regularly
> for poor battery performance that is caused by a number of simple,
correctable
> application problems."
>
> End of quote ... Basically memory (loss of capacity) due to discharge is a
myth.
>
>
> --
> Knight-Toolworks & Custom Planes
> Custom made wooden planes at reasonable prices
> See http://www.knight-toolworks.com For prices and ordering instructions.

---

› See More: v60i battery

Further, V60 batteries are Lithium Ion and do not suffer from memory.
They do suffer from being run all the way down if my friend, the electrical
engineer, can be believed.


--
Thomas M. Goethe

"Steve Knight" <[email protected]> wrote in message
news:[email protected]...
> On Wed, 15 Oct 2003 22:27:33 -0000, [email protected] (G G)
wrote:
>
> >Ya it can never hurt to let the battery drain completely then charge up
> >fully, repeat
>
> From GE Tech Notes ....
>
> "Among the many users of batteries in both the industrial and consumer
> sectors, the idea of a memory phenomenon in nickel-cadmium batteries has
been
> widely misused and understood. The term 'memory' has become a catch-all
> 'buzzword' that is used to describe a raft of application problems, being
most
> often confused with simple voltage depression.
>
> "To the well informed, however, 'memory' is a term applied to a
specific
> phenomenon encountered very infrequently in field applications.
Specifically,
> the term 'memory' came from an aerospace nickel-cadmium application in
which the
> cells were repeatedly discharged to 25% of available capacity (plus or
minus 1%)
> by exacting computer control, then recharged to 100% capacity WITHOUT
OVERCHARGE
> [emphasis in the original]. This long term, repetitive cycle regime, with
no
> provisions for overcharge, resulted in a loss of capacity beyond the 25%
> discharge point. Hence the birth of a "memory" phenomenon, whereby
> nickel-cadmium batteries purportedly lose capacity if repeatedly
discharged to a
> specific level of capacity.
>
> "The 'memory' phenomenon observed in this original aerospace
application was
> eliminated by simply reprogramming the computer to allow for overcharging.
[Note
> that no mention is made of adding an intentional *discharge* to clear the
> problem - RLM] In fact, 'memory' is always a completely reversible
condition;
> even in those rare cases where 'memory' cannot be avoided, it can easily
be
> erased. Unfortunately, the idea of memory-related loss of capacity has
been with
> us since. Realistically, however, ' memory' cannot exist if any one of the
> following conditions holds:
>
> 1. Batteries achieve full overcharge.
> 2. Discharge is not exactly the same each cycle - plus or minus
2-3%
> 3. Discharge is to less than 1.0 volt per cell.
>
> "Remember, the existence of any ONE of these conditions eliminates the
> possibility of 'memory'. GE has not verified true 'memory' in any field
> application with the single exception of the satellite application noted
above.
> Lack of empirical evidence notwithstanding, 'memory' is still blamed
regularly
> for poor battery performance that is caused by a number of simple,
correctable
> application problems."
>
> End of quote ... Basically memory (loss of capacity) due to discharge is a
myth.
>
>
> --
> Knight-Toolworks & Custom Planes
> Custom made wooden planes at reasonable prices
> See http://www.knight-toolworks.com For prices and ordering instructions.

On Sat, 25 Oct 2003 23:08:07 GMT, Steve Knight
<[email protected]> posted in alt.cellular.motorola:

>Realistically, however, ' memory' cannot exist if any one of the
>following conditions holds:
>
> 1. Batteries achieve full overcharge.
> 2. Discharge is not exactly the same each cycle - plus or minus 2-3%
> 3. Discharge is to less than 1.0 volt per cell.

4. The battery is Lithium Ion. (Which is the case with most cell
phones.)
--
Al - rukbat at optonline dot net

On Sat, 25 Oct 2003 23:08:07 GMT, Steve Knight
<[email protected]> posted in alt.cellular.motorola:

>Realistically, however, ' memory' cannot exist if any one of the
>following conditions holds:
>
> 1. Batteries achieve full overcharge.
> 2. Discharge is not exactly the same each cycle - plus or minus 2-3%
> 3. Discharge is to less than 1.0 volt per cell.

4. The battery is Lithium Ion. (Which is the case with most cell
phones.)
--
Al - rukbat at optonline dot net

On Sun, 26 Oct 2003 17:12:08 -0500, "Thomas M. Goethe"
<[email protected]> posted in alt.cellular.motorola:

> Further, V60 batteries are Lithium Ion and do not suffer from memory.
>They do suffer from being run all the way down if my friend, the electrical
>engineer, can be believed.

There's a protection circuit in the battery. If you run it down (or
let it run down on the shelf) past the cutoff point, there's no way to
charge it without a special piece of equipment that bypasses the
protection circuit.
--
Al - rukbat at optonline dot net

On Sun, 26 Oct 2003 17:12:08 -0500, "Thomas M. Goethe"
<[email protected]> posted in alt.cellular.motorola:

> Further, V60 batteries are Lithium Ion and do not suffer from memory.
>They do suffer from being run all the way down if my friend, the electrical
>engineer, can be believed.

There's a protection circuit in the battery. If you run it down (or
let it run down on the shelf) past the cutoff point, there's no way to
charge it without a special piece of equipment that bypasses the
protection circuit.
--
Al - rukbat at optonline dot net