I think he means 'accu' being short for accumulator, an old word for
battery, but commonly used for labelling in Europe.

Any contact spray should do a similar job, but it assumes that the
contacts are not working properly, so worth inspecting with a bright
light first. If leaking batteries have corroded the contacts, then
they need to be scraped clean first! If problems persist, try finding
a suitable 6V adaptor.

--- In Photosmart_850@yahoogroups.com, "Pete" <Humathe1st@...> wrote:
>
> This is a newibe question but what is an akku? Also what kind of
> contact spray?
>
> Thanks again
>
> Peter
>
>
>
> --- In Photosmart_850@yahoogroups.com, Jakab Laci <jaklac@> wrote:
> >
> > Contact spray battery(akku) and hp850 akku slot
> >
>