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From: erspert@athena.mit.edu (Ellen R. Spertus)
Newsgroups: sci.electronics,rec.autos.tech,misc.consumers
Subject: Car Battery Rechargers
Summary: Should I buy one?  Can I build my own?
Message-ID: <1990Oct4.222556.20668@athena.mit.edu>
Date: 4 Oct 90 22:25:56 GMT
Sender: daemon@athena.mit.edu (Mr Background)
Followup-To: sci.electronics
Organization: Massachusetts Institute of Technology
Lines: 15

I saw a car battery recharger for $60 in the Rand McNally map catalog.
If your battery is dead, you plug this into your cigarette lighter, and
it recharges the battery (enough to start) from a D battery.  It seems
like a neat idea.  I have a few questions:

1. Has anyone used one of these?  Any comments?

2. Can I build one of these myself?  I've built computers, etc.,
before, and I have access to lab equipment.  Anyone know where I could
get plans?  

Thanks.  Please direct follow-ups to the appropriate group or email
me.

					Ellen