Alt-BEAM Archive
Message #00159
To: tmairs@img.net, beam@corp.sgi.com
From: "James Niemasik" niemasik@hotmail.com
Date: Thu, 04 Feb 1999 07:55:34 PST
Subject: [alt-beam] Re: Why not button cells (WHAT?)
Here's a snippet of the ASCII BG Micro catalog (don't have time to set
up Acrobat at school here):
147 BAT1006 3v Lithium 50mAh Batt BAT 1 $1.19 0 3v Lithium 50mAh Batt
That’s right a 3 volt rechargeable Lithium coin cell rated 3Volt/50 mAh.
20.5mm mounting. Compare at $7.85 each. Great price. battery lithium 3v
0 9 0.00 0 $0.00 0 $0.00 0 $0.00
It looks to be about CR2032 size. Picture at
http://bgm.bgmicro.com/images/products/BAT1006.jpg.
Someone tell me whether this would be good or not.
>From: Tom Mairs
>To: "beam@corp.sgi.com"
>Subject: RE: Why not button cells (Re: WHAT?)
>Date: Thu, 4 Feb 1999 07:32:29 -0800
>Reply-To: Tom Mairs
>
>Some older computer motherboards - Baby AT style 386 and 486's - used a
>thin lithium 3.5 V rechargeable that was about the size of a quarter.
I
>salvaged a few and they work for a lot of applications, but they can't
>source a lot of current. Driving motors directly from them would drain
>them pretty quickly. These are not the 2222's you find in many newer
>systems.
>
>Has anyone tried these, or the canister type motherboard battery? They
> will deliver 3.6V at about 60mAh, and have a fast recharge. The
canisters
>are only 1 x 1.5 cm and aren't really that expensive when you look at
the
>hassle of tearing apart 9V Duracells. I haven't used then in any
motorized
>applications, but I will.
>
>
>TOM
>
>-----Original Message-----
>From: dennison [SMTP:dennlill@buffnet.net]
>Sent: Thursday, February 04, 1999 4:11 AM
>To: Michael Kennan; beam@corp.sgi.com
>Subject: Re: Why not button cells (Re: WHAT?)
>
>I remeber buying a rechargable litium button cell some time in the
past.
>
>Dennison
>
>
>
>>>This is a question for the leadership at large: wouldn't it be a
better
>>>design and somewhat more aesthetic to use alkaline button cells?
They
>tend
>>>to have a fair amount of charge available, you can easily find cell
>holders
>>>for the thinner types and you don't (usually) have to worry about
nasty
>>>chemicals or metal cuts.
>>
>>If you are referring to calculator/watch batteries, I do use them in
my
>>bots... but primarily in the solar bots. I usually place a home-made
>>socket for them right underneath the solar cell, so I can really fire
the
>>little buggers up when people want to see what they do. (Most mere
>mortals
>>don't seem to want to spend time-lapse quantities of time waiting to
grok
>>the overall behavior of the bot. Sheesh.) The only problem is that I
can
>>easily drain a $5 battery in a few minutes, some last tens of minutes,
but
>>not too long. Expensive hobby.
>>
>>The Duracell internal cells are a bit heavier, a bit more visually
>>obtrusive, but they sure last a long time.
>>
>
>
>
--
Note: "niemasik@hotmail.com" is an account I use only for sending
messages from school, please reply to "jfn@best.com" if possible.
* James Niemasik
* jfn@best.com
* James' BEAM Robotics Page:
* http://welcome.to/jamesbeam
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