Lidl special offers have a good looking battery charger on sale from thursday the 13th. Multi stage with sulphation break down capabilities only
12.99 with a three year guarantee, looks good to me, also it has clamp or ring terminal as standard. Can be left permanently connected, although it is not clear if it will re-start itself if the mains goes off, my guess is that it will BICBWlook on the lidl site, there is even a video about it.