> > And on further reflection it might be simpler to use a non rechargeable > battery. A good PP9 will supply about 400mAH which will cover a lot of > short outages. If you don't power the display, will a supercap hold you over during outage= s? Harold --=20 FCC Rules Updated Daily at http://www.hallikainen.com Not sent from an iPhone. --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .