In article ,
Guy King writes:
The message
from "Doki" contains these words:

Is it possible to DIY up a 6V charger for old car batteries, or to buy one
cheap?

Maplin do one - but it's low powered but has the advantage of changing
to trickle when full.
http://www.maplin.co.uk/Module.aspx?...EO&U=strat1 5

I've got this one. It has too high a charging voltage to
trickle charge, in spite of what it claims. You will need
to ensure you switch it off when battery is fully charged
(unless you like to hear fizzing noises and ballon-shaped
SLA batteries;-).

--
Andrew Gabriel