lithium battery with external AA pack
Chickeny
for a while and won't be able to recharge the lithium battery. when i am using
the AA batteries on the side, should i leave the lithium battery in (will it be
charged by the AA's?) or should i just take it out and use only the power of
the AA's?
- allison
you shaved your head, you pierced your nose
you've done it all, and all that's left are holes
----------------
members.aol.com/chickeny/index.html
of all the homepages on the net.. this is one of them
Jason Leung
Unless you have no electricity in India, you can recharge the lithium
battery that came with your 702. All you need is an international power
adapter/transformer to adjust the different voltages in India.
When you use your 702 with the additional battery pack, you can either use
it with both the lithium and the normal AA's, for extended playback, since
the player will use both battery sources simultaneously. Or, you could use
each battery one at a time. I would recommend using both batteries at the
same time for convenience... and the two AA batteries will not charge the
lithium battery; the lithium battery can only be charged from the AC
adapter.
I hope this has been of some help!
Jason Leung
cwl...@direct.ca
Chickeny wrote in message
<199807252118...@ladder01.news.aol.com>...
j...@mich.com
On 1998-07-25 chic...@aol.com(Chickeny) said:
>i got an AA battery pack for my sharp 702 because i am going to
>live in india for a while and won't be able to recharge the lithium
>battery. when i am using the AA batteries on the side, should i
>leave the lithium battery in (will it be charged by the AA's?) or
>should i just take it out and use only the power of the AA's?
Can't tell you about the Sharp but I can tell you about a Sony R2
External AAA pack will not charge the internal battery You may remove it
HOWEVER... You might wish to consider something like the battery pack
adapter I just made for my Sony R2... BIG BATTERIES (D cells) instead
of AAA's Note, I could have made it so it would charge as well but can not
see an advantage to charging the internal battery with an external battery
(Unless it's the one in my car, in which case other considerations apply)
Directions for building your own "D" class battery box.. In preceding msg
John F Davis, WA8YXM, In Delightful Detroit, aa...@detroit.freenet.org
"Nothing adds excitement like something that is none of your business"
Drive defensively. Buy a tank!
Net-Tamer V 1.08X - Registered
j...@mich.com
On 1998-07-26 cwl...@direct.ca said:
>Unless you have no electricity in India, you can recharge the
>lithium battery that came with your 702. All you need is an
>international power adapter/transformer to adjust the different
>voltages in India.
I'm going to invest in a "Solar Battery Charger" (Under 30 bucks, designed for
cars, more toy than tool when it comes to a car battery) and a few bucks for
an adapter to see if I can make it feed the MD... That should be interesting
When I'm done.... I'll post something... Heck, I'll likely tell SONY too
I'm visualizing the circuit (Very simple) even as I type
John F Davis, WA8YXM, In Delightful Detroit, aa...@detroit.freenet.org
"Nothing adds excitement like something that is none of your business"
*CAUTION* Incorrigible punster. Don't Incorrige!
Adler
-Adler
Chickeny wrote:
>
> i got an AA battery pack for my sharp 702 because i am going to live in india
> for a while and won't be able to recharge the lithium battery. when i am using
> the AA batteries on the side, should i leave the lithium battery in (will it be
> charged by the AA's?) or should i just take it out and use only the power of
> the AA's?
>
> - allison
>
> you shaved your head, you pierced your nose
> you've done it all, and all that's left are holes
> ----------------
> members.aol.com/chickeny/index.html
> of all the homepages on the net.. this is one of them
--
===============================
| Andy de los Reyes
| http://www.digicron.com/adler
| ad...@digicron.com
===============================
Rich Westerman
ridiculous for such an insubstantial item, thogh.
Rich Westerman
musi...@theramp.net
http://www.execpc.com/~danb/mandolin/westerman.html
Now Playing: just my tinitus
Adler wrote in message <35BF94EC...@digicron.com>...
ch...@my-dejanews.com
According to the manual which came with 702, you should always
leave the lithium barrery in 702 when you use add-on battery case,
The manual didn't say anything about the charging with barrery pack.
Just a quick question, how much did you pay for the battery pack?
Most of the stores ask for 40$ and I think it is really a scam for
such a trivial gadget.
Chia
In article <199807252118...@ladder01.news.aol.com>,
chic...@aol.com (Chickeny) wrote:
> i got an AA battery pack for my sharp 702 because i am going to live in india
> for a while and won't be able to recharge the lithium battery. when i am
using
> the AA batteries on the side, should i leave the lithium battery in (will it
be
> charged by the AA's?) or should i just take it out and use only the power of
> the AA's?
>
> - allison
>
> you shaved your head, you pierced your nose
> you've done it all, and all that's left are holes
> ----------------
> members.aol.com/chickeny/index.html
> of all the homepages on the net.. this is one of them
>
-----== Posted via Deja News, The Leader in Internet Discussion ==-----
http://www.dejanews.com/rg_mkgrp.xp Create Your Own Free Member Forum
Dan Bynum
holds 4 AA 1.5 volt batteries, giving 6V output. The holder comes with just
a bare cord, so I bought the 4.0x1.7mm DC Power Plug (Radio Shack part
number 274-1532). The two pieces together cost less than $5. Once I soldered
the plug onto the cable, I could plug it into my 702 where the wall power
adapter normally goes (NOT on the back where Sharp's proprietary battery
pack attaches). The recorder works quite well, with or without the lithium
cell inserted. And guess what, if I press the STOP button twice, my
home-made power pack starts charging the rechargable battery!
If you didn't want portability, and wanted to buy fewer alkaline cells, get
the holder that holds 4 D-cells, it should recharge your battery several
times before the cells are drained.
ch...@my-dejanews.com wrote in message <6qv1fo$19g$1...@nnrp1.dejanews.com>...
Alan Edwards
wrote:
>The recorder works quite well, with or without the lithium
>cell inserted. And guess what, if I press the STOP button twice, my
>home-made power pack starts charging the rechargable battery!
It has been reported that if you drop the voltage to 4.5v (3 batteries
instead of 4), it won't recharge the internal battery. The Sharp PSU
provides 5v, so the voltage regulator might be getting a bit hot
burning off the extra volt.
>If you didn't want portability, and wanted to buy fewer alkaline cells, get
>the holder that holds 4 D-cells, it should recharge your battery several
>times before the cells are drained.
About 8, assuming the internal battery is 0.5Ah. D-cells will also
run the deck for a lot longer.
There's no reason why you shouldn't put ni-cads into the external
battery pack, but you will need some sort of voltage monitor to avoid
over-discharging them.
Alan.
***************************************************************************
* Alan Edwards aedwards(@)netcomuk.co.uk *
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* *
* NOTE: Return email address is invalid! Replace ANTISPAM with UK. *
George Leroy TireByter
> There's no reason why you shouldn't put ni-cads
> into the external battery pack,
> but you will need some sort of voltage monitor
> to avoid over-discharging them.
Nickel-Cadmium batteries perform best when allowed to
discharge completely. Under-discharging them leads to
a reduction in capacity known as the "memory effect".
Lead-Acid batteries can be damaged by full discharge.
It is appropriate to monitor their voltage carefully.
I made an external battery pack for my Sharp MD-MS702
using four AA Nickel-Metal Hydride cells. These cells
are a little over 1.2 Volts, when fully charged. Four
of them in series results in 5 Volts, exactly what is
expected by the DC IN receptacle. These are available
at Radio Shack, Catalog Number 23-525. They also sell
a 1-hour charger, Catalog Number 23-405. The AA Ni-MH
cells have a 1200 milliamp-hour capacity, by the way.
This is 86% of D Ni-Cd cells, with 1400 mAh capacity.
Also, Ni-MH cells experience less of a memory effect.
I don't recommend delivering 6 Volts to the DC input.
This would be the total with four Alkaline Batteries.
The DC input receptacle on the Sharp MD-MS702 accepts
between 4 V and 5.5 V DC, according to page 29 of the
service manual, which is available online at the URL:
<http://www.connact.com/~eaw/minidisc/ms701_service_frame.html>
Finally, the correct plug is Catalog Number 274-1532.
-glt
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Anahata
>aedw...@netcomuk.co.antispam (Alan Edwards) wrote:
>
>> There's no reason why you shouldn't put ni-cads
>> into the external battery pack,
>> but you will need some sort of voltage monitor
>> to avoid over-discharging them.
>
>Nickel-Cadmium batteries perform best when allowed to
>discharge completely. Under-discharging them leads to
>a reduction in capacity known as the "memory effect".
>
month, but does not have to be fully discharged every time it is used.
Also, there is a danger in discharging a NiCd battery (consisting of
cells in series) too far. If some cells are weaker than others, a point
may be reached where one cell is pushed to reverse polarity. This
*will* damage it.
Anahata
ana...@freereed.demon.co.uk + http://www.freereed.demon.co.uk/
ana...@locust.co.uk email to mobile phone 8 line messages max
0171 638 5577 (W) 0171 229 6076 (H) 0976 263827 (mobile)
Erik Brunvand
Of course, the disadvantage of using the DC-input with an external
battery pack is that you lose the little battery-life icon on the 702
display. When you use the AA adapter with alkaline batteries you get
shorter life than the Ni-MH batteries that glt is talking about, but
you do get the little battery life indicator which can alert you to
when it's time to change batteries. Of course, the external battery
adapter is pretty expensive for what it is (just a little plastic box
that attaches to the side of the 702), and you have to order it from a
mailorder place that imports it from Japan since Sharp seems not to be
intereted in selling these to the US market... :-(
-Erik