Hi All, I'm looking for some ideas for building a Lead Acid battery charging circuit that I can attach to the battery whilst it is being used. I've been looking at the LM200 and circuits based on that, though I'm not sure how they would cope with the battery also being attached to a target circuit as well. Does anyone have any pointers? Am I worrying too much? Should I just connect both to the battery and be happy? Thanks for your advice! Josh -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist