Rejuvinating Lead/Acid Batterys

From: Mike Ford <mikeford_at_socal.rr.com>
Date: Tue Jun 29 18:06:01 2004

At 01:17 PM 6/27/04 -0700, Marvin Johnston wrote:

>I just found out about a new type of battery charger called the
>BatteryMinder that will (it is claimed) rejuvenate Lead/Acid batteries
>that are dead due to sulphating. A friend of mine used one on a battery
>that had been totally discharged for too long, and was able to recover
>it. He sent me a 12v one and I am looking around for some batteries to
>try it out ... like a couple of dozen Sharp PC-5000 lead/acid batteries
>:). If this works on *old* lead acid batteries, I will be one happy
>camper :)!
>
>If anyone is curious, their web site is at:
>http://www.vdcelectronics.com/batteryminder.htm



It smells like a scam, ie very expensive, so I went and read the patent.
Curious stuff.

The basic idea has been around for a bit, this patent is for a
refinement/variation. Sulphate crystals resonate at 3.26 mhz, and
apparently if you "hit" them with pulses around an amp that contain enough
energy at that frequency the crystals break up and go back into solution.
Older techniques used oscillators and transformers, and apparently were not
dual function, ie they knocked off crystals, but lacked basic bulk charging
circuits.

This design has a dual function, simple bulk recharge, then the pulse mode
to keep it charged and whack the sulphates. Pulse mode is a 20 khz
apparently variable width 1 amp pulse with edges tailored to hit the magic
3.26 mhz.

Let us know how it works and don't forget to put a scope on it.
Received on Tue Jun 29 2004 - 18:06:01 BST

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