Date: Fri, 12 Oct 2001 19:08:55 +1000
From: Dan Baker <[EMAIL PROTECTED]>
Subject: lithium-cells... i found a cheap supply! but are they right???
I have found a source for battery packs that contain 12 cells identical
to those in the 50-70 pack, however before I try them I need you guiys
to answer a question or two... I have no way of charging these packs and
I don't know what state of charge they are in, however I am getting
about 2.6 volts out of each cell and on a full short they provide about
5-10 amps... so, I was under the impression all lith-ion batts were of
3.6 volts... am I mistaken?
I don't want to put three in my dead batt pack and then over voltage
them when they are charged by the lib...
Anyone got any ideas? Neil? Raymond? (by the way Raymond, I am in
Geelong Vic. where are you?)
These packs (12 cells brand new) are available to me through a tech at a
laptop firm, he hasnt got a price yet but he thinks about $150 AUD, for
you guys in the UK or USA they would work out very cheap! If they work I
can get a few...
Next topic: Solar Panels
While hiking I use small solar panel on the top of my pack (the
weight is negligable) to charge a 7ah sealed lead-acid that beast runs
the lib 50 for about 8 hours which is more than enough, it also powers
my GPS, recharges my digital camera battery and Palm V, I then have
moving map where ever I am as well as 5 gig worth of photo storage...
Using a panel to RUN a lib is not worth the trouble, you would be
towing one behind you on a small tralier to get enough out of it and the
fluctuations in current would cause your lib to get upset and try to
hitch-hike home without you...
I run the panel through a regulator specifically designed for battery
charging, Jaycar do a kit here in Australia for about $10.00.
I have used this set-up extensively and have had no problems
whatsoever...
Keep up the good posts all of you...
Best Regards,
Dan Baker.
Matthew Hanson wrote:
> Date: Fri, 12 Oct 2001 07:00:25 +0000
> From: "Matthew Hanson" <[EMAIL PROTECTED]>
> Subject: Re: [LIB] Car power adapter
>
>> Date: Fri, 12 Oct 2001 12:13:40 +0800
>> From: Raymond <[EMAIL PROTECTED]>
>> Subject: Re: [LIB] Car power adapter
>>
>> I'm in Australia so I've got no idea what the equivalent stores in
>> the US would be but...
>
>
> Oh yeah! I often neglect to mention what country... residual American
> arrogence of some sort I suppose! Well... guess you'll be glad now
> that the cooler weather of fall is approaching, huh Raymond? ;-P
>
> Matt
>
>
>
>
> Jaycar Electronics here sells a DC to DC switchmode power supply
> designed for running laptops off a cigarette lighter. It can boost an
> input of between 12 volts and 15 volts to a regulated 15 to 24(!) volt
> 3.5 amp supply (without going from DC to AC and back again). That'd be
> more than enough for the libby (the libby's own switchmode supply is
> only rated at 2 amps). It sells for $90AUD (about $45USD I'd say).
> Unfortunately, the catalogue I've got doesn't mention a brand name ...
> it looks a lot like a slightly bigger version of those normal
> cigarette lighter adapters though - like the ones for CD players and
> the like (except those normally only convert voltage down from 12
> volts where this one converts up).
>
>>
>> Oh ya, and your buzzing is probably because your inverter creates a
>> modified sinewave (really just 2 or more square waves put together)
>> which the switchmode supply for the libby won't like.
>>
>> - Raymond
>>
>>
>>
>>
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