Re: battery pulsing gizmo
- From: "Pete M" <chuck_wagon@xxxxxxxxx>
- Date: Sat, 07 Apr 2007 04:15:09 GMT
"Mark Olson" <olsonm@xxxxxxxxxxxx> wrote in message
news:131e12es5ipmjb5@xxxxxxxxxxxxxxxxxxxxx
Pete M wrote:
I had a sales pitch from someone selling a battery life extending gizmo,
apparently how it works is... it goes across the terminals and draws a
few ma from the battery, then uses this to send back a higher voltage
jolt. It does this every few seconds. It's supposed to reduce the
sulfating of the plates when its stored and extend the life of the
battery.
The pitch was for use on stored boat batteries, so it should work for a
bike battery as well. Except the boat batteries were regular lead acid
top-em-up things, not the no-maintenance type like the bike, I don't know
if the chemistry would be that different.
I have a problem with the math though... :o)
They want ~$70 for one of these things, probably about the price of a new
bike battery, which is supposed to last ~7 yrs.
If this adds the 20-30% life to the battery they claim, then I would have
to go thru ~5 batteries before I start to get a payback... or ~35 yrs.
That's if the gizmo is still working at that point.
Given that I'm over 50... maybe I'll not bother.. :o)
But if anyone has any comments on these things it would be interesting to
hear them...
Well, don't you think if they could possibly put their product in a
better light, they would? You've already done the maths of the
economics of the thing, which pretty much makes it irrelevant whether
it actually does what it claims. In other words, the best case is
that it's uneconomical but it does extend battery life a little,
the worst case is it is more or less a total waste of money.
What I can tell you, is there will be inefficiencies in any device
that stores and releases energy, so the net effect on the state
of charge of the battery is that the battery will drain faster
than if it was just left sitting. You'd do better to keep the
battery in a very cold place to slow down the rate of self-discharge
and connect nothing to it.
--
'01 SV650S '99 EX250-F13 '98 ZG1000-A13
OMF #7
My gut feeling is that lead acid batteries are due to go they way of the CRT
anyways... they've been around about the right amount of time and there's
gotta be something better on the horizon...
This item can't be a new idea either, and if it was that terrific, battery
makers would just build it into batteries I figure, couldn't cost more than
a couple of bucks in this day and age.
I was at a talk recently on supercapacitors, I do mech stuff at work, so I
didn't totally get it, but it the pros of them over batteries in some
applications was very interesting...
P.
.
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