Re: (ET) Battery maintainers

[Robert Adsett <subscriptions aeolusdevelopment com>]

At 08:31 PM 1/5/05 -0500, Fixinguys aol com wrote:
> Question from a non-electronics guy:
> My wife has a wall cube gizmo which takes 110v and distributes it to 
> either 18v, 12v, 9v, or 6v, depending on the port you plug into the 
> laptop, radio, etc.  Why does it seem so elusive to develop a unit which 
> takes 36v and distributes it to 18v (lift), 12v (lift), 24v (chainsaw), or 
> 36v (original implements), thereby eliminating equalization problems and 
> extending battery life?

They do make them.  Chris is right the big issue is power.  You are 
essentially talking about a 40 Amp motor controller.  Reasonably common but 
rather more expensive than a wall wart.  With an inductive load (like a 
motor) they will generally be fairly efficient.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                        Kelvin Throop, III