Battery Desulphation Unit

I am considering fitting a Battery Desulphation Unit to my narrowboat
leisure batteries (4 x 200AHr units) to initially reverse sulphation
and then to keep them sulphate free.
Does anyone have any experience of such devices and any
recommendations as to which one is best. So far in the UK I have only
found one unit made by Sterling Power Products, the Pro Pulse.

Tia,

Les

"Tony Brooks" <Tony@tb-training.co.uk> wrote in message
news:GrednW-kPYLP6PPVnZ2dnUVZ8uidnZ2d@bt.com...
>
(snip)
> Iain
>
> If you have been using the power supply to do constant currant charging
> (as opposed to the more usual constant voltage a battery charger tends to
> use) until the relative density/specific gravity stopped rising then I
> suggest that the more likely explanation would be the probably high
> charging voltage towards the end of charging did a lot of de-sulphating.
>
> Of course if you did not get the voltage above 15 volts the above is
> nonsense.
>
> I just wish I could lay my hands on a reasonable power supply so I could
> do constant currant charging in the late winter.

The voltage went up to about 16 for short periods, with about 10A charge
current. I didn't leave them like that unattended (after the first one
:-) ), as they tended to gas furiously and spit a bit. The device says it
works by putting high voltage spikes into the battery, so the theory seems
to agree with " high charging voltage.........did a lot of de-sulphating."

Must aquire a pile of dead batteries for a bit of comparative testing :-}
--
Iain