Just in case anybody missed this one.. auto battery chargers in Lild now for £12.99

http://www.lidl.co.uk/cps/rde/xchg/lidl_uk/hs.xsl/index_17091.htm

ive got one. Left it on the gell battery tray over winter. Its been great.

Very good chargers --- they will probably have the other type in the next few weeks.

Aldi seem to also have them every spring a few weeks after Lidl.

This is a handy post. I bought one yesterday and put it on the car. Haven't checked since as I forgot I had done it. Are they safe to leave on like an optimate?

left mine on for three months on the frost protection setting.