Bruce Partridge wrote: > More information: > > I'm using a 16F819 and drawing 125 uA during sleep. The regulator is > 50uA, and the only other component is the op amp which should be <5uA > when shutdown. ADC, BOR, LVP, PWM are all shutdown. All other pins > are outputs and are set to 0. What about the voltage divider for the battery voltage you mentioned before? We need to see a schematic. There seems to be a lot you are not telling us. > VCC is tied to VREF+ at 4V. Vcc for what? What is the PIC power tied to? ***************************************************************** Embed Inc, embedded system specialists in Littleton Massachusetts (978) 742-9014, http://www.embedinc.com -- http://www.piclist.com hint: The PICList is archived three different ways. See http://www.piclist.com/#archives for details.