Again, this isn't a regular 3.7v lipo, and I'm not exactly charging it using conventional methods. I just checked digikey and they have pretty cheap step up converters( http://semicon.njr.co.jp/eng/PDF/NJU7261series_E.pdf ). This one seems to do what I need, 3v output. I have a question though. In the equivelent schematic it shows a voltage divider to get an output voltage reference for the comparator. I don't see any info on the datasheet about reverse current draw though. Does anyone know the typical reverse current draw for one of these, if input voltage is too low?